RedactedNarrative: Vessel 1 is described as a 41.5 foot fiberglass inboard.  Vessel 1 was traveling east to west in the Gulf of Mexico.  The vessel was located approximately one (1) mile south of Cameron Parish.  As Vessel 1 was traveling Operator1 noticed an RPM change in the motor.  Operator1 came to neutral to inspect the motors of Vessel 1.  Operator1 noticed smoke coming from the engine compartment.  Operator1 opened the engine compartment to inspect and was engulfed in flames.  Operator1 did not have time to grab his fire extinguisher because he feared that the flames would cause an explosion.  Operator1 jumped overboard and was later rescued by a vessel.  The vessel caught fire and burned to the water line.  Vessel 1's location was south of Rutherford beach in Cameron Parish.  Operator1 was the only passenger onboard the vessel.  Operator1 did not get injured.  PFD's were on the vessel, but were not used.  The type of steering on Vessel 1 is remote steering.  The type of incident is unknown fire.  The contributing factor is unknown.  Drugs/alcohol were not tested for.