Coast Guard officials in Miami say they received a report Thursday evening about an unmanned inflatable dinghy adrift in Dinner Key. Items belonging to 30-year-old Trevor Moore were onboard.
Moore is from Naples and was last seen wearing a dark shirt and swim shorts.
The Coast Guard issued an Urgent Marine Information Broadcast for boaters to be on the lookout for a possible person in the water.
The Florida Fish and Wildlife Conservation Commission, Miami-Dade Fire-Rescue, Miami-Dade police and the National Park Service are assisting in the search.