Fishermen spotted the whales, several of which had beached themselves, on Tuesday night. They're in shallow water in the Everglades National Park.
The outlook for them isn't promising.
There are 41 stranded whales. Six more were found dead, and four others had to be put down.
They are in a remote area near Highland Beach, the western boundary of the park and about 20 miles east of where they normally live.
Such strandings are common. Last year, nearly two dozen pilot whales stranded and beached themselves in Florida.
Alan White is a news editor for BuzzFeed News and is based in London.
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