Two subjects were aboard vessel-1 traveling south in biscayne bay, approximately 500 yards from the entrance to matheson hammock. Vessel-1 fire alarm went off and operator activated the extinguisher system.  Smoke and flames began to come from the engine room.  Both operator and occupant were able to exit vessel-1 and board a family member's vessel.  Coast guard, boat us and sea tow responded, but were unable to extinguish the fire, vessel-1 burned to the water line.  Boat us began the salvage of vessel-1.
CORAL GABLES                  