Published: Jan 28, 2013 11:02 AM EST
Updated: Jan 28, 2013 12:44 PM EST

LEE COUNTY, Fla.- A dead manatee was discovered today in the Caloosahatchee River. It was found by the Tarpon Street pier.

So far, it's unclear what caused the manatee's death. According to the the Florida Fish and Wildlife Conservation Commission, 74 manatees were found dead in Lee County last year.

Boaters are asked to be extra cautious.