This is a clam found in oyster cages and it had part of its flesh out but we don’t know why.
A duck was swimming in the water an and was mostly black. It also had ducklings swimming near.
Blue Mussel (Mytilus edulis) attached to Eastern Oyster shell, Pier 5, Brooklyn Bridge Park, Brooklyn/Manhattan, NYC, April 2024
Tracks of Atlantic Oyster Drill (Urosalpinx cinerea), Pier 5, Brooklyn Bridge Park, Brooklyn/Manhattan, NYC, April 2024
2 more! They must like this plant