A body was found Saturday in the Delaware River behind the Adventure Aquarium in Camden.
Camden fire crews responded about 4 p.m. after an aquarium employee discovered the body.
The body was identified Monday as that of David Opoku, 27. Coast Guard officials said Opoku was wearing a blue jumpsuit.
State police officials said he was often around the Camden area and in Trenton.
The state police major-crimes unit is investigating.