"Politicians and nonprofit groups have blamed offshore wind turbines for whale deaths, but the science doesn’t support those claims—at all"
"Conducting necropsies on beached whales to pin down a cause of death is made difficult by the animals’ layer of blubber and by the fact that organs can literally cook inside a stranded whale. But it is starkly clear that human activity—in the form of ships that hit whales or fishing gear that wraps around them—is often to blame."
My hypothesis would be that once construction is finished, the inverse could be true, because the foundations provide shelter for a whole ecosystem (see abandoned oil rigs) which might trickle down to bigger fish (or mammals in this case).