From the North Florida News Daily:
The Florida Fish and Wildlife Conservation Commission (FWC) reminds anglers that new rules go into effect June 1 requiring all people fishing from a vessel in the Gulf of Mexico off Florida for any reef fish species to carry and use circle hooks, dehooking devices and venting tools.

These new rules are intended to help more Gulf reef fish survive if they must be released when they are not legal to harvest. Many reef fish species . . . need protection, and anglers can help maintain and rebuild reef fish stocks by properly handling and releasing fish._