RedactedNarrative: On June 12, 2021, at approximately 1700 hours Florida Fish and Wildlife Conservation Commission, investigated a boating accident. Florida vessel FL0046RB departed Dania Cut Off Canal in Dania Beach, FL enroute to the Bahamas with two persons onboard. The operator of the vessel OP1 and the crewmember.  During the transit, CREWMEMBER identified smoke bellowing out of the engine room, and grabbed the fire extinguisher from the cabin of the vessel. CREWMEMBER initial actions to extinguish the fire were unsuccessful. CREWMEMBER then retreated to the second helm station to assist in re-establishing radio communication to broadcast the ‘MAYDAY”. Once the MAYDAY was broadcasted and received by United States Coast Guard (USCG), they made the decision to abandon the vessel. Both persons mustered on the bow of the vessel and grabbed a fender for flotation and jumped into the water. USCG arrived on scene and pulled both OP1 and CREWMEMBER from the water and took them Fort Lauderdale Marina in Fort Lauderdale, FL.  vessel was engulfed in flames and burned completely to the water line causing the vessel to capsize and sink.