This appears to be a small Gulf or Bay. Naturally traffic is high density here. This is not open Sea.
Speed restrictions on eastern coast of USA already exist to protect Right whales. I honestly don’t know how much good that does.
I am a seafarer and love when we sight whales and dolphins at sea. For a ship it is almost impossible to see a whale until they surface.
The only sure way of avoiding whale deaths is to stop sea going ships. Which I don’t see happening.