UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION 
                           Washington, D.C. 20549 

                                  FORM 6-K 

                      REPORT OF FOREIGN PRIVATE ISSUER
                      PURSUANT TO RULE 13a-16 OR 15d-16
                    OF THE SECURITIES EXCHANGE ACT OF 1934 

                                September 30, 2005 

                         Commission File Number 0-21392 

                            AMARIN CORPORATION PLC 
               (Translation of registrant's name into English) 

                              7 Curzon Street
                              London W1J 5HG
                                 England
                   (Address of principal executive offices) 

     Indicate by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form 40-F: 

               Form 20-F [X]       Form 40-F [   ]

     Indicate by check mark whether by furnishing the information contained
in this Form, the registrant is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.


                  Yes [   ]       No [X]



________________________________________________________________________________



The following exhibits are furnished as part of this Form 6-K:

Exhibit
Number                     Description


  99.1         Amarin Corporation plc interim financial statements as of
               and for the six months ended 30 June 2005 and 2004 (Unaudited)

  99.2         Awareness letter of PricewaterhouseCoopers LLP

 

   This report on Form 6-K is hereby incorporated by reference in (a) the
registration statement on Form F-3 (Registration No. 333-104748) of Amarin
Corporation plc and in the prospectus contained therein, (b) the registration
statement on Form F-3 (Registration No. 333-13200) of Amarin Corporation plc and
in the prospectus contained therein, (c) the registration statement on Form
F-3 (Registration No. 333-12642) and in the prospectus contained therein,
(d) the registration statement on Form F-3 (Registration No. 333-121431) of
Amarin Corporation plc and in the prospectus contained therein and (e) the
registration statement on Form F-3 (Registration No. 333-121760) of Amarin
Corporation plc and in the prospectus contained therein, and this report on
Form 6-K shall be deemed a part of each such registration statement from the
date on which this report is filed, to the extent not superseded by documents
or reports subsequently filed or furnished by Amarin Corporation plc under the
Securities Act of 1933 or the Securities Exchange Act of 1934.


________________________________________________________________________________


                                SIGNATURES 

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized. 


                                    AMARIN CORPORATION PLC

                                    By: /s/ RICHARD A.B. STEWART
                                    Name: Richard A.B. Stewart
                                    Title: Chief Executive Officer


Date: September 30, 2005 




________________________________________________________________________________


EXHIBIT INDEX 


Exhibit
Number                     Description


  99.1         Amarin Corporation plc interim financial statements as of
               and for the six months ended 30 June 2005 and 2004 (Unaudited)

  99.2         Awareness letter of PricewaterhouseCoopers LLP