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Thousands of sharks gather off Florida coast

February 17, 2011 12:00:00 AM PST
Thousands of sharks have been spotted swimming near Boca Raton off the coast of Florida.

Marine biologists have an explanation for the mass gathering. They say it's the time of the year when sharks migrate and head for warmer waters, hugging the shoreline as they go.

Environmentalists say the gathering is actually a good sign. The shark population has been declining since the 1970s.

They say the mass congregation shows the numbers may be bouncing back.