Ilya the manatee was spotted in New York harbor late last week after a month-long trip that began in Key West with stops in Maryland and Massachusetts.
Ilya, who was first tagged by the U.S. Fish and Wildlife Service 10 years ago, had found a warm place to stay near a refinery in Linden, N.J., and officials were hoping he'd stay put.
Their plan was to get Ilya out of the frigid Northern waters and transport him back to his home in the Keys. Manatees generally need water temperatures of 68 degrees and above to survive, and the water off New Jersey was in the low 60s last week.
But now, no one has seen Ilya since Friday afternoon. Bob Schoelkopf of the Marine Mammal Stranding Center says he hopes Ilya is heading south on his own, but he's hoping the sea cow will be spotted again.