The sei whale was taken to the Army Corps of Engineers facility in New Jersey where the Riverhead Foundation will conduct tests to determine cause of death.
The wayward animal stopped moving shortly after 5:30 p.m. after getting wedged between a rock and a pillar below the Union Street Bridge.
Boaters spotted the 6-foot, 1,000 pound sea turtle tangled in lobster pot lines about a mile north of Mount Sinai Harbor around 8:40 p.m. Monday.
Two of the animals, a pygmy sperm whale and a white-sided dolphin are dead, were found dead on a beach in the Hamptons. The other, a grey seal, was discovered at Tobay Beach in Nassau County and appears healthy.
Lucy was rescued from Westhampton Beach last year but has now been given the all clear to be released back to her home under the Ponquogue Bridge in Hampton Bays.
It looks like the one-year-old male was bitten by a shark before it was rescued.
A finback whale that washed up dead on a New York beach likely was killed when it was hit by a passing ship.