Florida ? A pygmy sperm whale found stranded off the Florida Keys was in critical condition at a rehabilitation center on Sunday.

The 10 1/2-foot long male was discovered Saturday off Islamorada and transferred to the Marine Mammal Conservancy in Key Largo for testing.

The roughly 1,000-pound whale was swimming a little on his own. “He’s still dehydrated,” Robert Lingenfelser, the center’s president, said. “We’re giving him fluids every four hours.”

Volunteers will be with the whale 24 hours a day helping to support and comfort him in the rehabilitation lagoon.