EVERGLADES NATIONAL PARK, Fla. -- National wildlife officials say 24 whales believed to be part of a pod found stranded in the Everglades have not been located again by air, a potentially encouraging sign they have moved farther offshore.

National Oceanic and Atmospheric Administration stranding coordinator Blair Mase says a Coast Guard air search Friday also found a group of seven whales swimming in 12 to 14 feet of water south of where they were located a day before.

Two other whales were seen floating in shallow water near the shore of Plover Key.

A fishing guide discovered several beached whales and dozens of others in the waters off a remote section of the Everglades Tuesday. Six were found dead the next day and four others were euthanized.