Oct 21 (Reuters) - Mowi ASA: * REG-MOWI’S ACQUISITION OF NOVA SEA APPROVED * DEAL EXPECTED TO RESULT IN NOK 400 MILLION SYNERGIES ANNUALLY Source text: Further company coverage: (Gdansk Newsroom) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)