A cut and paste from here http://www.fishinginireland.info/regulations.htm
•Catch and release from 01 January to 31 March 2019•1 fish in any 24 hour period 01 April to 31 October 2019
•Catch and release from 01 November – 31 December 2019.
•A minimum size limit of 42cm applies.
•It is prohibited to retain on board, relocate, tranship or land European sea bass caught in Irish waters.