RedactedNarrative: Observe a vessel that appears to be fully engulfed in flames, alongside burning vessel and has located a life raft with 02 adults and 02 dogs. All 4 were recovered safely and all are accounted for.  The owner of the vessel and the 2 survivors will contact owner and find out what his salvage plan is.  The operator stated they were coming back from the Dry Tortugas when they observed black smoke coming from the cabin around 1400Q. They had approximately 350 gal diesel onboard at the time. Tried to get a mayday out but cabin was quickly engulfed in smoke. They entered their life raft with their two dogs and were subsequently rescued.  Fire Department responded to the boat fire and extinguished the fire. They are unable to provide any documentation and stated there was no sheen observed from the vessel. The vessel remains at anchor and the bow remains visible (aft of the bow burned to the water line).  Owner is working with insurance company for salvage.