RedactedNarrative: On June 25, 2016 Vessel LA 1399 FT, a 19'4" Remote Steering side console vessel, powered by a 190 hp mercury inboard motor, was on anchor on the Mermentau River.  While at anchor near the Eastern shore, the vessel drifted into shallow waters and became grounded.  
  
  One of the passengers pulled the anchor up and voluntarily jumped into the water to try and push or pull the bow of the vessel from the mud.  When the passenger jumped into the water, he landed on unknown objects beneath the water surface.  This caused numerous lacerations to the subject.  The other passengers pulled the injured subject into the vessel and the vessel was able to break free from the mud.  The vessel was on the east side of the Mermentau river, just north of highway 82 bridge, and I was almost directly across when this incident occurred.  The vessel left the east side of the Mermentau River and started heading west towards me waving their hands and yelling.  I observed one passenger bleeding from both wrists and legs from a distance.  I identified myself and after obtaining consent, I applied first aid and notified LDWF  dispatch.  EMS arrived and transported the injuried passenger to South Cameron Hospital.  Alcohol and/or drugs were not a factor.  Sufficient number of PFD's were present, and used on the children aboard the vessel.  The contributing factor is the person left the boat voluntarily.  The type of incident is grounding.