It will kill the fishies caught up in the turbines. Shame on you for putting our energy needs ahead of the fish!
/sarcasm/
"It will kill the fishies caught up in the turbines." /sarc/
I see a two-fold benefit here. Harvest the energy and the poor dead fish to feed the crews working on the rigs. Or build a floating cannery next to the rigs, can the fish and send them to welfare recipents instead of handing out foodstamps that they use to buy Twinkies and Soda with.
Problem solved.