RedactedNarrative: On December 20, 2020 at approximately 10:25 A.M. Operator 1 was operating LA 5923 FW (Vessel 1), which is a 26' Southfork aluminum flat with a remote steer 225HP Yamaha outboard on the Cheniere Au Tigre Canal with four (4) passengers.  Operator 2 was operating LA 3414 AS (Vessel 2) which is a 24' homemade mud boat with remote steering with eight (8) passengers.   V1 and V2 were being operated too fast for the given conditions in a head on situation in a curve with a tree partially blocking the canal and operators views on the inside of the curve.  When V2 came in sight of V1, V1 turned to port to get on or closer to the shore and slowed down exposing the starboard stern portion of V1 where two occupants were sitting on a bench seat along the gunwale.  When V1 came in sight of V2, V2 slowed down.  The speed they were both traveling was too fast to avoid collision so V2 impacted V1 with its starboard bow at an approximately 20 degree angle towards the middle of the starboard gunwale.  Two occupants were ejected into the water due to the force of the crash.  One passenger from V1 had serious injuries and was taken to a hospital in Abbeville then transferred to Lafayette for surgery to his intestine.  We were advised by his wife that he has injuries to his back, hip and ribs.  Another passenger Victim 1 From V1 stated he has pain in his ribs, chest, back and right hip and has sought medical attention.  Evidence suggests that their injuries were a result of the aluminum railing striking them as it broke away from V1 or them striking the railing themselves as they were forced out of their seat and/or actually being impacted by V2 during the crash.  We were advised that all operators and passengers were wearing PFD's at the time of the incident.  Impairment is not considered to be a factor and both operators voluntarily submitted to a blood test.  Currently the blood alcohol content of both Operator 1 and Operator 2 was negative (.000g%) and toxicology results are pending.  (See attached).    Note:   Rules of the Road, specify #'s, 1, 9, 13, and 16.   Citation Issued to Operator 1 for Careless operation.   Citation issued to Operator 2 for Careless operation.