Rescued 655-Pound Sea Turtle Released off Cape Cod The New England Aquarium in Boston say it's released a 7-foot-long, 655-pound leatherback sea turtle back into waters off Cape Cod after it was treated for dehydration, trauma and shock. The turtle was found stranded near the tip of the cape Thursday. Experts at the aquarium say the male turtle was underweight and lethargic, and a large portion of its left front flipper was missing because of some kind of trauma. A 655 pound leatherback sea turtle that became stranded near the tip of Cape Cod last week was released back into the water Saturday. Experts at the New England Aquarium cared for the seven-foot-long animal before tagging it and freeing it. (Sept. 23) Close Veterinarians treated it with drugs to stabilize its blood values and oxygen levels. Aquarium officials say the turtle regained its strength, and they released it off Harwichport on Saturday. They say its prognosis isn't clear. Experts treated the turtle using information obtained from research on leatherbacks that were briefly captured over the past few summers off Cape Cod.