Police made a grizzly discovery in the waters near a south Brooklyn park Sunday night — a floating hand.

Authorities responded to 911 calls of a hand found in a creek inside Calvert Vaux Park close to Shore Parkway and Bay 46th Street in Gravesend around 5:30 p.m., cops said.

Police have not yet identified, who the hand belonged to and believe it to have been in the water for a while.