RedactedNarrative: On June 15, 2018, vessel, LA 5561 CA, was anchored off the west side of Caminada Pass near the Gulf of Mexico.  The vessel is described as a 15 feet aluminum hull powered by a 40 HP Yamaha with remote steering.  The occupants were fishing.  The vessel was anchored from the bow in an outgoing current near a sandbar.  A wave crested over the stern flooding the vessel.  The vessel sank.  Family members from the shore helped the occupants get to shore.  PFD were not used but were on board.  Alcohol or drugs could not be determined to be a factor.  The type of incident can be classified as a flooding/sinking.  Agents were not able to locate the vessel.