The dolphin was trapped in the creek near Cropsey Avenue and Bay 54th Street, police said.
Authorities are investigating a dead dolphin that washed shore in a creek off Shell Road.
A bottlenose dolphin appeared in the East River Friday afternoon.
The dolphin was first spotted about 11:45 a.m. swimming in the East River near 96th Street.
Preliminary results from a necropsy suggest that the dolphin was old, underfed and chronically ill.
The bleeding dolphin was seen swimming in the Gowanus Friday afternoon.
NYPD's Harbor Patrol and Emergency Services Unit helped rescue the dolphin.
A dolphin found dead in the Hudson River last month did not have any signs of food in it.
The dead dolphin found near Chelsea Piers has been in a freezer for nearly a week.
A dolphin was found dead near Chelsea Piers days after one was spotted in the Hudson, officials said.
Onlookers spotted a dolphin swimming in the Hudson River, making its way from Harlem to Chelsea.
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