SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


SCHEDULE 13D

Under the Securities Exchange Act of 1934 


Spinnaker Exploration Company, Inc.
(Name of Issuer)

Common Stock, $0.01 Par Value Per Share
(Title of Class of Securities)

			
84855W109
(CUSIP Number)

James E. McKee
GAMCO Investors, Inc.
One Corporate Center
Rye, New York 10580-1435
(914) 921-5294
(Name, Address and Telephone Number of Person Authorized to Receive Notices and 
Communications)

	
September 22, 2005
(Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report 
the acquisition that is the subject of this Schedule 13D, and is filing this 
schedule because of Section 240.13d-1(e), 240.13d-1(f)
or 240.13d-1(g), check the following box.  



CUSIP No. 84855W109										
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
Gabelli Funds, LLC	                                           		I.D. NO.  
13-4044523	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)		


(b)	

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
    00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER				
 
682,000  (Item 5)
 
8

 

SHARED VOTING POWER				

NONE
 
9



SOLE DISPOSITIVE POWER				

682,000  (Item 5)

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

682,000  (Item 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)			
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

2.00%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA

CUSIP No. 84855W109										
	
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
GAMCO Asset Management Inc.                                           	
	I.D. NO.  13-4044521	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)			


(b)	

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
 00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH
 
7



SOLE VOTING POWER				

969,800  (Item 5)

 
8



SHARED VOTING POWER				

NONE
 
9



SOLE DISPOSITIVE POWER				

1,037,300  (Item 5)

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,037,300 (Item 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)			
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

3.04%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA, CO

CUSIP No. 84855W109										
	
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
Gabelli Securities, Inc.                                           		I.D. NO.  
13-3379374	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)	


(b)	

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)	
00- Client funds

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   Delaware

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH
 
7



SOLE VOTING POWER				

164,100      (Item 5)
 
8



SHARED VOTING POWER				

NONE
 
9



SOLE DISPOSITIVE POWER				

 164,100    (Item 5)

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

   164,100                  (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)				
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.48%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)	
    HC, CO
CUSIP No. 84855W109										
	
1	
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
MJG Associates, Inc.                                          		
	I.D. NO.  06-1304269	
2	
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)	


(b)	

3	
SEC USE ONLY


4	
SOURCE OF FUNDS (SEE INSTRUCTIONS)	
00-Client Funds

5	
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6	
CITIZENSHIP OR PLACE OF ORGANIZATION
   Connecticut

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7


SOLE VOTING POWER				

   9,600   (Item 5)
 
8



SHARED VOTING POWER				

NONE

9


SOLE DISPOSITIVE POWER				

      9,600        (Item 5)

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     9,600                (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 (SEE INSTRUCTIONS)				
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.03%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)	
 CO

CUSIP No. 84855W109									
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
GGCP, Inc.		                                              
I.D. NO.  13-3056041	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)			


(b)	

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
   None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH
 
7



SOLE VOTING POWER				

None   (ITEM 5)

8



SHARED VOTING POWER				

NONE 

9



SOLE DISPOSITIVE POWER				

NONE    (ITEM 5) 

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

   NONE 
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X								
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

   0.00%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No. 84855W109									
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
GAMCO Investors, Inc. 
I.D. NO.  13-4007862	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)	
(a)	


(b)	

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH
 
7



SOLE VOTING POWER				

None 
 
8



SHARED VOTING POWER				

NONE
 
9



SOLE DISPOSITIVE POWER				

NONE 

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE 
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X											
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.00%

14


TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No. 84855W109										
	
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
								 					       
Mario J. Gabelli	
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) 	
(a)	


(b)	

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
 00 - Funds of family partnership

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 
PURSUANT TO ITEMS 2 (d) OR 2 (e)   


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   USA

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH
 
7



SOLE VOTING POWER				

None      (Item 5) 
 
8



SHARED VOTING POWER				

NONE
 
9



SOLE DISPOSITIVE POWER				

NONE     (ITEM 5) 

10



SHARED DISPOSITIVE POWER			

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE 
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X								
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.00%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IN

Item 1.		Security and Issuer
		The class of equity securities to which this statement on Schedule 
13D relates is the Common Stock, par value $0.01 per share ("Securities"), of 
Spinnaker Exploration Company (the "Issuer"), a Delaware corporation with 
principal offices located at 1200 Smith Street, Suite 800, Houston, Texas 
77002.

Item 2.		Identity and Background
This statement is being filed by Mario J. Gabelli ("Mario 
Gabelli") and various entities which he
directly or indirectly controls or for which he acts as chief investment 
officer.  These entities, except for Lynch Corporation ("Lynch") and Lynch 
Interactive Corporation ("Interactive"), engage in various aspects of the 
securities business, primarily as investment adviser to various institutional 
and individual clients, including registered investment companies and pension 
plans, and as general partner of various private investment partnerships.  
Certain of these entities may also make investments for their own accounts.
		The foregoing persons in the aggregate often own beneficially more 
than 5% of a class of a particular issuer.  Although several of the foregoing 
persons are treated as institutional investors for purposes of reporting their 
beneficial ownership on the short-form Schedule 13G, the holdings of those who 
do not qualify as institutional investors may exceed the 1% threshold presented 
for filing on Schedule 13G or implementation of their investment philosophy may 
from time to time require action which could be viewed as not completely 
passive.  In order to avoid any question as to whether their beneficial 
ownership is being reported on the proper form and in order to provide greater 
investment flexibility and administrative uniformity, these persons have 
decided to file their beneficial ownership reports on the more detailed 
Schedule 13D form rather than on the short-form Schedule 13G and thereby to 
provide more expansive disclosure than may be necessary.
		(a), (b) and (c) - This statement is being filed by one or more of 
the following persons: GGCP, Inc.  formerly known as Gabelli Group Capital 
Partners, Inc. ("GGCP"), GAMCO Investors, Inc. formerly known as Gabelli Asset 
Management Inc. ("GBL"), Gabelli Funds, LLC ("Gabelli Funds"), GAMCO Asset 
Management Inc. formerly known as GAMCO Investors, Inc. ("GAMCO"), Gabelli 
Advisers, Inc. ("Gabelli Advisers"), Gabelli Securities, Inc. ("GSI"), Gabelli 
& Company, Inc. ("Gabelli & Company"), Gabelli & Company, Inc. Profit Sharing 
Plan (the "Plan"), MJG Associates, Inc. ("MJG Associates"), Gabelli Foundation, 
Inc. ("Foundation"), Mario Gabelli, Lynch, and Interactive.  Those of the 
foregoing persons signing this Schedule 13D are hereafter referred to as the 
"Reporting Persons".
		GGCP makes investments for its own account and is the parent 
company of GBL.  GBL, a public company listed on the New York Stock Exchange, 
is the parent company for a variety of companies engaged in the securities 
business, including those named below.
		GAMCO, a wholly-owned subsidiary of GBL, is an investment adviser 
registered under the Investment Advisers Act of 1940, as amended ("Advisers 
Act").  GAMCO is an investment manager providing discretionary managed account 
services for employee benefit plans, private investors, endowments, foundations 
and others.
		GSI, a majority-owned subsidiary of GBL, acts as a general partner 
or investment manager to limited partnerships and offshore investment companies 
and as a part of its business may purchase or sell securities for its own 
account.  It is the immediate parent of Gabelli & Company. GSI is the 
Investment Manager of Gabelli Associates Fund, Gabelli Associates Fund II, 
Gabelli Associates Limited, ALCE Partners, L.P., and Gabelli Multimedia 
Partners, L.P.  GSI and Marc Gabelli own 45% and 55%, respectively, of Gabelli 
Securities International Limited ("GSIL"). GSIL provides investment advisory 
services to offshore funds and accounts.   GSIL is an investment advisor of 
Gabelli International Gold Fund Limited, Gabelli European Partners, Ltd., and 
Gabelli Global Partners, Ltd.
		Gabelli & Company, a wholly-owned subsidiary of GSI, is a broker-
dealer registered under the Securities Exchange Act of 1934, as amended ("1934 
Act"), which as a part of its business regularly purchases and sells securities 
for its own account.
		Gabelli Funds, a wholly owned subsidiary of GBL, is a limited 
liability company. Gabelli Funds is an investment adviser registered under the 
Advisers Act which presently provides discretionary managed account services 
for The Gabelli Equity Trust Inc., The Gabelli Asset Fund, The Gabelli Growth 
Fund, The Gabelli Convertible and Income Securities Fund, Inc., The Gabelli 
Value Fund Inc., The Gabelli Small Cap Growth Fund, The Gabelli Equity Income 
Fund, The Gabelli ABC Fund, The Gabelli Global Telecommunications Fund, Gabelli 
Gold Fund, Inc., The Gabelli Global Multimedia Trust Inc., The Gabelli Global 
Convertible Securities Fund, Gabelli Capital Asset Fund, Gabelli International 
Growth Fund, Inc., The Gabelli Global Growth Fund, The Gabelli Utility Trust, 
The Gabelli Global Opportunity Fund, The Gabelli Utilities Fund, The Gabelli 
Blue Chip Value Fund, The Gabelli Mathers Fund, The Gabelli Woodland Small Cap 
Value Fund, The Comstock Capital Value Fund, The Comstock Strategy Fund, The 
Gabelli Dividend and Income Trust, The Gabelli Global Utility & Income Trust, 
The Gabelli Global Gold, Natural Resources, & Income Trust (collectively, the 
"Funds"), which are registered investment companies.
		Gabelli Advisers, a subsidiary of GBL, is an investment adviser 
which provides discretionary advisory services to The Gabelli Westwood Mighty 
Mitessm Fund.
		The Plan, a qualified employee profit sharing plan, covers 
substantially all employees of GBL and its affiliates.
		MJG Associates provides advisory services to private investment 
partnerships and offshore funds.  Mario Gabelli is the sole shareholder, 
director and employee of MJG Associates.   MJG Associates is the Investment 
Manager of Gabelli International Limited, Gabelli International II Limited, 
Gabelli Performance Partnership, and Gabelli Fund, LDC.
The Foundation is a private foundation.  Mario Gabelli is the 
President, a Trustee and the
Investment Manager of the Foundation.	
		Lynch is a public company traded on the American Stock Exchange 
engaged in manufacturing.  Interactive is a public company listed on the 
American Stock Exchange and is a holding company with operating subsidiaries 
engaged primarily in the rural telephone industry.  Lynch and Interactive 
actively pursue new business ventures and acquisitions. Lynch and Interactive 
make investments in marketable securities to preserve capital and maintain 
liquidity for financing their business activities and acquisitions and are not 
engaged in the business of investing, reinvesting, or trading in securities.  
Mario J. Gabelli is a director, officer and a substantial shareholder of 
Interactive and a substantial shareholder of Lynch.
		Mario Gabelli is the majority stockholder and Chairman of the Board 
of Directors and Chief Executive Officer of GGCP and GBL, and the Chief 
Investment Officer for each of the Reporting Persons other than Lynch.  GGCP is 
the majority shareholder of GBL. GBL, in turn, is the sole stockholder of 
GAMCO.  GBL is also the majority stockholder of GSI and the largest shareholder 
of Gabelli Advisers.  Gabelli & Company is a wholly-owned subsidiary of GSI. 
		The Reporting Persons do not admit that they constitute a group.
		GGCP, GBL, GAMCO, and Gabelli & Company are New York corporations 
and GSI and Gabelli Advisers are Delaware corporations, each having its 
principal business office at One Corporate Center, Rye, New York 10580.  
Gabelli Funds is a New York limited liability company having its principal 
business office at One Corporate Center, Rye, New York 10580.  MJG Associates 
is a Connecticut corporation having its principal business office at 140 
Greenwich Avenue, Greenwich, CT 06830.  The Foundation is a Nevada corporation 
having its principal offices at 165 West Liberty Street, Reno, Nevada 89501.  
Lynch is an Indiana corporation having its principal business office at 50 
Kennedy Plaza, Suite 1250, Providence, Rhode Island 02903.  Interactive is a 
Delaware corporation having its principal place of business at One Corporate 
Center, Rye, New York 10580.  
		For information required by instruction C to Schedule 13D with 
respect to the executive officers and directors of the foregoing entities and 
other related persons (collectively, "Covered Persons"), reference is made to 
Schedule I annexed hereto and incorporated herein by reference.
(f) - Reference is made to Schedule I hereto.

Item 3.		Source and Amount of Funds or Other Consideration
		The Reporting Persons used an aggregate of approximately 
$122,028,533 to purchase the Securities reported as beneficially owned in Item 
5. GAMCO and Gabelli Funds used approximately $66,817,706 and $43,968,592 
respectively, of funds that were provided through the accounts of certain of 
their investment advisory clients (and, in the case of some of such accounts at 
GAMCO, may be through borrowings from client margin accounts) in order to 
purchase the Securities for such clients.  GSI used approximately $10,622,000 
of client funds to purchase the Securities reported by it.  MJG Associates used 
approximately $620,235 of client funds to purchase the Securities reported by 
it.  

Item 4.		Purpose of Transaction
		Each of the Reporting Persons has purchased and holds the 
Securities reported by it for investment for one or more accounts over which it 
has shared, sole, or both investment and/or voting power, for its own account, 
or both.
		The Reporting Persons, with the exceptions of Lynch and 
Interactive, are engaged in the business of securities analysis and investment 
and pursue an investment philosophy of identifying undervalued situations.  In 
pursuing this investment philosophy, the Reporting Persons analyze the 
operations, capital structure and markets of companies in which they invest, 
including the Issuer, on a continuous basis through analysis of documentation 
and discussions with knowledgeable industry and market observers and with 
representatives of such companies (often at the invitation of management).  The 
Reporting Persons do not believe they possess material inside information 
concerning the Issuer.  As a result of these analytical activities one or more 
of the Reporting Persons may issue analysts reports, participate in interviews 
or hold discussions with third parties or with management in which the 
Reporting Person may suggest or take a position with respect to potential 
changes in the operations, management or capital structure of such companies as 
a means of enhancing shareholder values.  Such suggestions or positions may 
relate to one or more of the transactions specified in clauses (a) through (j) 
of Item 4 of Schedule 13D including, without limitation, such matters as 
disposing of one or more businesses, selling the company or acquiring another 
company or business, changing operating or marketing strategies, adopting or 
not adopting, certain types of anti-takeover measures and restructuring the 
company's capitalization or dividend policy.
		Each of the Reporting Persons intends to adhere to the foregoing 
investment philosophy with respect to the Issuer.  However, none of the 
Reporting Persons intends to seek control of the Issuer or participate in the 
management of the Issuer, and any Reporting Person that is registered as an 
investment company under the 1940 Act will participate in such a transaction 
only following receipt of an exemption from the SEC under Rule 17d-1 under the 
1940 Act, if required, and in accordance with other applicable law.  In 
pursuing this investment philosophy, each Reporting Person will continuously 
assess the Issuer's business, financial condition, results of operations and 
prospects, general economic conditions, the securities markets in general and 
those for the Issuer's securities in particular, other developments and other 
investment opportunities, as well as the investment objectives and 
diversification requirements of its shareholders or clients and its fiduciary 
duties to such shareholders or clients.  Depending on such assessments, one or 
more of the Reporting Persons may acquire additional Securities or may 
determine to sell or otherwise dispose of all or some of its holdings of 
Securities.  Although the Reporting Persons share the same basic investment 
philosophy and although most portfolio decisions are made by or under the 
supervision of Mario Gabelli, the investment objectives and diversification 
requirements of various clients differ from those of other clients so that one 
or more Reporting Persons may be acquiring Securities while others are 
disposing of Securities.
		With respect to voting of the Securities, the Reporting Persons 
have adopted general voting policies relating to voting on specified issues 
affecting corporate governance and shareholder values.  Under these policies, 
the Reporting Persons generally vote all securities over which they have voting 
power in favor of cumulative voting, financially reasonable golden parachutes, 
one share one vote, management cash incentives and pre-emptive rights and 
against greenmail, poison pills, supermajority voting, blank check preferred 
stock and super-dilutive stock options.  Exceptions may be made when management 
otherwise demonstrates superior sensitivity to the needs of shareholders.  In 
the event that the aggregate voting position of all joint filers shall exceed 
25% of the total voting position of the issuer then the proxy voting committees 
of each of the Funds shall vote their Fund's shares independently.
		Each of the Covered Persons who is not a Reporting Person has 
purchased the Securities reported herein as beneficially owned by him for 
investment for his own account or that of one or more members of his immediate 
family.  Each such person may acquire additional Securities or dispose of some 
or all of the Securities reported herein with respect to him.
		Other than as described above, none of the Reporting Persons and 
none of the Covered Persons who is not a Reporting Person has any present plans 
or proposals which relate to or would result in any transaction, change or 
event specified in clauses (a) through (j) of Item 4 of Schedule 13D.

Item 5.		Interest In Securities Of The Issuer
		(a) The aggregate number of Securities to which this Schedule 13D 
relates is 1,893,000 shares, representing 5.55% of the 34,136,776 shares 
outstanding as reported by the Issuer on Form 10-Q for the quarter ended June 
30, 2005.  The Reporting Persons beneficially own those Securities as follows:


Name


Shares of
Common Stock

                % of 
Class of
Common
Gabelli Funds
	
682,000
2.00%
GAMCO

1,037,300
                      
3.04%
GSI
164,100
0.48%

MJG Associates

9,600

0.03%

Mario Gabelli

0

0.00%
 
		Mario Gabelli is deemed to have beneficial ownership of the 
Securities owned beneficially by each of the foregoing persons.  GSI is deemed 
to have beneficial ownership of the Securities owned beneficially by Gabelli & 
Company.  GBL and GGCP are deemed to have beneficial ownership of the 
Securities owned beneficially by each of the foregoing persons other than Mario 
Gabelli and the Foundation.	
(b) Each of the Reporting Persons and Covered Persons has the sole 
power to vote or direct the vote and sole power to dispose or to direct the 
disposition of the Securities reported for it, either for its own benefit or 
for the benefit of its investment clients or its partners, as the case may be, 
except that (i) GAMCO does not have authority to vote 67,500 of the reported 
shares, (ii) Gabelli Funds has sole dispositive and voting power with respect 
to the shares of the Issuer held by the Funds so long as the aggregate voting 
interest of all joint filers does not exceed 25% of their total voting interest 
in the Issuer and, in that event, the Proxy Voting Committee of each Fund shall 
respectively vote that Fund's shares, (iii) at any time, the Proxy Voting 
Committee of each such Fund may take and exercise in its sole discretion the 
entire voting power with respect to the shares held by such fund under special  
circumstances such as regulatory considerations, and (iv) the power of Mario 
Gabelli, GBL, and GGCP is indirect with respect to Securities beneficially 
owned directly by other Reporting Persons.
		(c) Information with respect to all transactions in the Securities 
which were effected during the past sixty days or since the most recent filing 
on Schedule 13D, whichever is less, by each of the Reporting Persons and 
Covered Persons is set forth on Schedule II annexed hereto and incorporated 
herein by reference.
		(d) The investment advisory clients of, or partnerships managed by, 
GAMCO, Gabelli Funds, Gabelli Advisers, GSI and MJG Associates have the sole 
right to receive and, subject to the notice, withdrawal and/or termination 
provisions of such advisory contracts and partnership arrangements, the sole 
power to direct the receipt of dividends from, and the proceeds of sale of, any 
of the Securities beneficially owned by such Reporting Persons on behalf of 
such clients or partnerships.  The shares reported as beneficially owned by 
Mario Gabelli are held by a family partnership that has the sole right to 
receive and, subject to the notice, withdrawal and/or termination provisions of 
such advisory contracts and partnership arrangements, the sole power to direct 
the receipt of dividends from, and the proceeds of sale of, any of the 
Securities beneficially owned by such Reporting Persons on behalf of such 
clients or partnerships. Except as noted, no such client or partnership has an 
interest by virtue of such relationship that relates to more than 5% of the 
Securities.
(e) Not applicable.


Item 6.		Contracts, Arrangements, Understandings or Relationships with 
Respect
		to Securities of the Issuer
		The powers of disposition and voting of Gabelli Funds, Gabelli 
Advisers, GAMCO, GSI and MJG Associates with respect to Securities owned 
beneficially by them on behalf of their investment advisory clients, and of MJG 
Associates and GSI with respect to Securities owned beneficially by them on 
behalf of the partnerships which they directly or indirectly manage, are held 
pursuant to written agreements with such clients, partnerships and funds. 

Item 7. 	Material to be Filed as an Exhibit
	The following Exhibit A is attached hereto.  The following Exhibit B is 
incorporated by reference to Exhibit C in the Amendment No. 8 to Schedule 13D 
of the Reporting Persons with respect to Edgewater Technologies, Inc.

Exhibit A:
Joint Filing Agreement


Exhibit B:
Powers of Attorney to Douglas R. Jamieson and James E. McKee 
from Robert E. Dolan

Powers of Attorney to Douglas R. Jamieson and James E. McKee 
from Raymond H. Keller.

Powers of Attorney to Douglas R. Jamieson and James E. McKee 
from Mario J. Gabelli.

Powers of Attorney to Karyn M. Nappi, and James E. McKee from 
Marc J. Gabelli.



Signature
	After reasonable inquiry and to the best of my knowledge and belief, I 
certify that the information set forth in this statement is true, complete and 
correct.
Dated:	October 3, 2005 

GGCP, INC.
MARIO J. GABELLI
MJG ASSOCIATES, INC.
							

						

By:/s/ James E. McKee			
	James E. McKee
	Attorney-in-Fact




GAMCO INVESTORS, INC.
GABELLI FUNDS, LLC
GABELLI SECURITIES, INC.
					             
					             
					             


By:/s/ James E. McKee			
	James E. McKee
	Secretary or Assistant Secretary
	
				

GAMCO ASSET MANAGEMENT INC.


By:/s/ Douglas R. Jamieson			
	Douglas R. Jamieson
	Executive Vice President


SCHEDULE I

     Information with Respect to Executive
Officers and Directors of the Undersigned
	
		Schedule I to Schedule 13D is amended, in pertinent part, as 
follows:

The following sets forth as to each of the executive officers and 
directors of the undersigned: his name; his business address; his 
present principal occupation or employment and the name, principal 
business and address of any corporation or other organization in 
which such employment is conducted.  Unless otherwise specified, 
the principal employer of each such individual is GGCP, Inc., GAMCO 
Investors, Inc., Gabelli Funds, LLC, Gabelli & Company, Inc., or 
GAMCO Asset Management Inc., the business address of each of which 
is One Corporate Center, Rye, New York 10580, and each such 
individual identified below is a citizen of the United States.  To 
the knowledge of the undersigned, during the last five years, no 
such person has been convicted in a criminal proceeding (excluding 
traffic violations or similar misdemeanors), and no such person was 
a party to a civil proceeding of a judicial or administrative body 
of competent jurisdiction as a result of which he was or is subject 
to a judgment, decree or final order enjoining future violations 
of, or prohibiting or mandating activities subject to, federal or 
state securities law or finding any violation with respect to such 
laws except as reported in Item 2(d) of this Schedule 13D.

GGCP, Inc.
Directors:

Vincent J. Amabile

Mario J. Gabelli  
Business Consultant
Chairman and Chief Executive Officer of GGCP, 
Inc., and GAMCO Investors, Inc.; Director/Trustee 
of all registered investment companies advised by 
Gabelli Funds, LLC; Chief Executive Officer of 
Lynch Interactive Corporation.

Charles C. Baum
Secretary & Treasurer
United Holdings Co., Inc.
2545 Wilkens Avenue
Baltimore, MD   21223

Arnold M. Reichman
Business Consultant

Marc J. Gabelli
President of GGCP, Inc.; Chairman of Lynch 
Corporation

Matthew R. Gabelli
Vice President - Trading
Gabelli & Company, Inc.
One Corporate Center
Rye, New York 10580
Officers:

Mario J. Gabelli

Marc J. Gabelli

Chairman, Chief Executive Officer and Chief 
Investment Officer

President
	Henry Kiernan
Vice President, Chief Financial Officer and 
Secretary

	



GAMCO Investors, Inc.
Directors:

	
               Edwin L. 
Artzt



                
               Raymond C. 
Avansino, Jr.

Former Chairman and Chief Executive Officer
Procter & Gamble Company
900 Adams Crossing
Cincinnati, OH 45202

Chairman
E.L. Wiegand Foundation
165 West Liberty Street
Reno, NV 89501

	Mario J. Gabelli

              
               John D. 
Gabelli


See above


Senior Vice President

	

	John C. Ferrara
See below



	Karl Otto Pohl (1)




              Robert S. 
Prather


              


              Frederic V. 
Salerno

              
              Vincent S. 
Tese




               Alan C. 
Heuberger

Sal. Oppenheim jr. & Cie.
Bockenheimer Landstrasse 20
D-6000 FRANKFURT AM MAIN
Germany

President & Chief Operating Officer
Gray Television, Inc.
4370 Peachtree Road, NE
Atlanta, GA 30319


Former Vice Chairman and Chief Financial Officer 
Verizon Communications

Lawyer, Investment Adviser and Cable Television 
Executive
c/o Bear Stearns & Company, Inc.
245 Park Avenue, 19th Floor
New York, NY 10167

Cascade Investment LLC
2365 Carillon Point
Kirkland, WA 98033

Officers:

	Mario J. Gabelli

Chairman, Chief Executive Officer and Chief 
Investment Officer

Douglas R. Jamieson

Henry G. Van der Eb

Michael R. Anastasio, 
Jr.

President and Chief Operating Officer

Senior Vice President

Vice President and Chief Financial Officer
	James E. McKee

Vice President, General Counsel and Secretary 

GAMCO Asset Management Inc.
Directors:


	Douglas R. Jamieson
	Joseph R. Rindler, 
Jr.
	Regina M. Pitaro
	F. William Scholz, II
	William S. Selby


Officers:


	Mario J. Gabelli
Chief Investment Officer

	Joseph R. Rindler, 
Jr.
Chairman

	Douglas R. Jamieson

              Michael R. 
Anastasio, Jr.
Executive Vice President and Chief Operating 
Officer

Vice President and Chief Financial Officer
Gabelli Funds, LLC
Officers:


	Mario J. Gabelli

Chief Investment Officer
	Bruce N. Alpert
Executive Vice President and Chief Operating 
Officer

	James E. McKee
Secretary



Gabelli Advisers, Inc.
Directors:


	Bruce N. Alpert
	John D. Gabelli
	Joseph R. Rindler. 
Jr.


Officers:


	Bruce N. Alpert
Chief Operating Officer

	James E. McKee
Secretary

Gabelli Securities, Inc.


Directors:


	Robert W. Blake
President of W. R. Blake & Sons, Inc.
196-20 Northern Boulevard
Flushing, NY   11358

	Douglas G. DeVivo
General Partner of ALCE Partners, L.P.
One First Street, Suite 16
Los Altos, CA   94022

	Joseph R. Rindler, 
Jr.

               Douglas R. 
Jamieson

               F. William 
Scholz, II
   
              
See above 

President and Chief Operating Officer

See above




Officers:


	Douglas R. Jamieson

               Michael R. 
Anastasio

               James E. McKee
See above

Vice President and Chief Financial Officer

Assistant Secretary



Gabelli & Company, Inc.
Directors:


	James G. Webster, III
Chairman & Interim President

	Irene Smolicz
Senior Trader
Gabelli & Company, Inc.



Officers:


	James G. Webster, III
Chairman & Interim President

	Bruce N. Alpert
Vice President - Mutual Funds



               James E. McKee
Secretary


Lynch Corporation, 
140 Greenwich Avenue, 4th Floor
Greenwich, CT 06830

Directors:



 
	
              E. Val Cerutti

Business Consultant, Cerutti Consultants
227 McLain Street
Mount Kisco, NY   10540
	
Avrum Gray



              Marc J. Gabelli

              John C. Ferrara

              
              Anthony R. 
Pustorino

Gbar Limited Partnership
440 South LaSalle, Suite 2900
Chicago, IL 60605

Chairman

President and Chief Executive Officer


Professor Emeritus
Pace University
1 Martine Avenue
White Plains, NY 10606

Officers:




 
            John C. Ferrara
See above

	


	Eugene Hynes
Secretary and Treasurer




Lynch Interactive Corporation, 
401 Theodore Fremd Avenue Rye, NY 10580


Directors:


	Paul J. Evanson
President
Allegheny Energy, Inc.
10435 Downsville Pike
Hagerstown, MD 21740

	Mario J. Gabelli

See above - GGCP, Inc.


	Salvatore Muoio
Principal
S. Muoio & Co., LLC
Suite 406
509 Madison Ave.
New York, NY 10022

	 Daniel Lee




               Morris Berkowitz





               John C. Ferrara
Chairman and Chief Executive Officer
Pinnacle Entertainment, Inc.
3800 Howard Hughes Parkway, Suite 1800 
Las Vegas, Nevada 89109 

Consultant
Lynch Interactive Corporation
401 Theodore Fremd Ave.
Rye, NY 10580


See above

               





Officers:


	Mario J. Gabelli
Chairman and Chief Executive Officer

	Robert E. Dolan 

Chief Financial Officer

               John A. Cole

Vice President, Corporate Development
Secretary and General Counsel
	(1) Citizen of Germany

                                     



                                      SCHEDULE II
                            INFORMATION WITH RESPECT TO
                 TRANSACTIONS EFFECTED DURING THE PAST SIXTY DAYS OR
                 SINCE THE MOST RECENT FILING ON SCHEDULE 13D (1) 
                                     SHARES PURCHASED     AVERAGE
                        DATE              SOLD(-)         PRICE(2) 
 COMMON STOCK-SPINNAKER EXPLORATION CO. 
          MJG ASSOCIATES, INC. 
                       9/19/05            1,000            64.6067 
		GABELLI FUND, LDC
                       9/19/05              600            64.6212
	      GABELLI PERFORMANCE PARTNERSHIP
                       9/19/05            5,000            64.6067 
	      GABELLI INTERNATIONAL LTD
                       9/19/05            3,000            64.6067 
          GABELLI SECURITIES, INC. 
                       9/22/05           20,000            63.9484 
                       9/19/05            1,000            64.6067
	    	GABELLI ASSOCIATES FUND II
                       9/20/05              500            64.1918 
                       9/19/05            2,200            64.6760 
          	GABELLI ASSOCIATES FUND
                       9/23/05            4,900            64.0654 
                       9/22/05            4,400            63.8064 
                       9/21/05            6,100-           64.0368 
                       9/20/05           10,700            64.1923 
                       9/19/05            4,800            64.9500 
                       9/19/05           48,700            64.6531
		GABELLI ASSOCIATES LTD
                       9/23/05            5,300            64.0653 
                       9/22/05            5,000            63.8062 
                       9/21/05            7,300-           64.0369 
                       9/20/05           12,300            64.1922 
                       9/19/05           53,500            64.6699 
                       9/19/05            5,200            64.9500 
          GAMCO ASSET MANAGEMENT INC. 
                       9/29/05           10,000            64.3500 
                       9/29/05            1,500            64.3500 
                       9/29/05           11,000            64.3345 
                       9/28/05           15,000            64.2452 
                       9/28/05            1,000            64.1380 
                       9/28/05            6,500            64.2390 
                       9/27/05            1,500            64.2167 
                       9/26/05            2,000            64.2100 
                       9/26/05           16,600            64.1992 
                       9/26/05              500            64.1700 
                       9/26/05            1,000            64.1600 
                       9/23/05              500            64.0822 
                       9/23/05            1,500            64.0702 
                       9/23/05            8,000            64.1603 
                       9/23/05            1,800            64.0675 
                       9/23/05            1,000            64.0642 
                       9/22/05            1,500            63.8090 
                       9/22/05           27,500            63.8345 
                       9/22/05            1,300            63.8119 
                       9/22/05            1,000            63.8050 
                       9/22/05            1,000            63.8140 
                       9/21/05            1,000-           64.0301 
                       9/21/05           18,000            64.0259 
                       9/21/05           23,500            64.0934 
                       9/21/05            1,800-           64.0335 
                       9/21/05            1,000            64.1500 
                       9/21/05            2,200-           64.0353 
                       9/21/05            1,600-           64.0376 
                       9/20/05            6,700            64.1500 
                       9/20/05            1,500            64.1553 
                       9/20/05            4,000            64.2000 
                       9/20/05            5,300            64.2592 
                       9/20/05           72,200            64.2266 
                       9/20/05            2,500            64.2500 
                       9/20/05            9,000            64.2426 
                       9/20/05            2,500            64.1800 
                       9/20/05            2,000            64.1918 
                       9/20/05            3,900            64.1931 
                       9/20/05            3,200            64.1941 
                       9/20/05            1,400            64.1972 
                       9/20/05            1,000            64.1100 
                       9/19/05            2,000            64.6000 
                       9/19/05           20,000            64.6067 
                       9/19/05            3,000            64.7200 
                       9/19/05            1,000            64.6110 
                       9/19/05           80,000            64.5725 
                       9/19/05           13,000            64.7342 
                       9/19/05            3,000            64.5900 
                       9/19/05           12,000            64.6200 
                       9/19/05            1,800            64.6212 
                       9/19/05           15,600            64.6393 
                       9/19/05           20,000            64.6400 
                       9/19/05           19,300            64.6420 
                       9/19/05           30,000            64.6433 
                       9/19/05           18,000            64.6477 
                       9/19/05           26,000            64.6478 
                       9/19/05            7,800            64.6609 
                       9/19/05            7,000            64.6714 
                       9/19/05            2,000            64.6726 
                       9/19/05            1,500            64.6886 
                       9/19/05            2,000            64.6900 
                       9/19/05            1,000            64.7000 
                       9/19/05            3,000            64.7100 
                       9/19/05           21,000            64.2810 
                       9/19/05            3,000            64.5569 
                       9/19/05            5,500            64.5725 
                       9/19/05          455,000            64.5742 
           GABELLI FUNDS, LLC. 
		   GLOBAL UTILITY AND INCOME TRUST
                       9/19/05           10,000            64.5997 
               GABELLI MATHERS FUND
                       9/21/05            1,000            64.1500 
                       9/20/05            1,000            64.2200 
               GABELLI UTILITY TRUST
                       9/19/05           20,000            64.6820 
               GABELLI UTILITY FUND
                       9/19/05           25,000            64.6820 
               GABELLI EQUITY TRUST
                       9/22/05           30,000            63.8662 
                       9/19/05           45,000            64.5997 
               GABELLI EQUITY INCOME FUND
                       9/22/05           15,000            63.8192 
                       9/20/05           10,000            64.3500 
                       9/19/05           45,000            64.6820 
               GABELLI DIVIDEND & INCOME TRUST
                       9/19/05          300,000            64.4145 
               GABELLI CONVERTIBLE FUND
                       9/19/05           25,000            64.5997 
               GABELLI ASSET FUND
                       9/22/05           15,000            63.8662 
                       9/19/05           25,000            64.5997 
               GABELLI CAPITAL ASSET FUND
                       9/22/05            5,000            63.8662 
                       9/19/05           25,000            64.5997 
               GABELLI ABC FUND
                       9/19/05           85,000            64.7345

(1) UNLESS OTHERWISE INDICATED, ALL TRANSACTIONS WERE EFFECTED
    ON THE NYSE.

(2) PRICE EXCLUDES COMMISSION. 














































Exhibit A

JOINT FILING AGREEMENT

		In accordance with Rule 13d-1(f) under the securities Exchange Act 
of 1934, as amended, the undersigned hereby agree to the joint filing with all 
other Reporting Entities (as such term is defined in the Schedule 13D referred 
to below) on behalf of each of them of a statement on Schedule 13D (including 
amendments thereto) with respect to the Common Stock, par value of $0.01 per 
share, of Spinnaker Exploration Company, and that this Agreement be included as 
an Exhibit to such joint filing.  This Agreement may be executed in any number 
of counterparts all of which taken together shall constitute one and the same 
instrument.
		IN WITNESS WHEREOF, the undersigned hereby execute this agreement 
this 3rd day of October, 2005.


MARIO J. GABELLI
MARC J. GABELLI
GGCP, INC.
GABELLI PERFORMANCE PARTNERSHIP L.P.
GABELLI INTERNATIONAL LIMITED
GABELLI INTERNATIONAL II LIMITED
GABELLI FUND, LDC
MJG ASSOCIATES, INC.
GABELLI FOUNDATION, INC.
GEMINI CAPITAL MANAGEMENT LLC


By:/s/ James E. McKee				
	James E. McKee
	Attorney-in-Fact

	


GAMCO INVESTORS, INC.
GABELLI FUNDS, LLC
GABELLI SECURITIES, INC.
GLI, INC.
GABELLI & COMPANY, INC.


By: /s/ James E. McKee
	James E. McKee
	Secretary or Assistant Secretary












ALCE PARTNERS, L.P.
GABELLI MULTIMEDIA PARTNERS, L.P.
GABELLI EUROPEAN PARTNERS MASTER FUND, LTD.
GABELLI GLOBAL PARTNERS MASTER FUND, LTD.
GABELLI ASSOCIATES LIMITED
GABELLI ASSOCIATES FUND



By:/s/ James E. McKee				
	James E. McKee
	Secretary of Gabelli Securities Inc.


	




LYNCH CORPORATION
SPINNAKER INDUSTRIES, INC
BRIGHTON COMMUNICATIONS CORPORATION
LYNCH INTERACTIVE CORPORATION
WESTERN NEW MEXICO
INTER-COMMUNITY TELEPHONE COMPANY



BY:/s/ James E. McKee 
	James E. McKee
	Attorney-in-Fact



GABELLI & COMPANY, INC.
PROFIT SHARING PLAN



By:/s/ Douglas R. Jamieson			
	Douglas R. Jamieson
	Trustee



GAMCO ASSET MANAGEMENT, INC.


By:/s/ Douglas R. Jamieson			
	Douglas R. Jamieson
	Executive Vice President