(CNN) -- Mitchell Guist, a star of the reality TV show "Swamp People," died Monday in Louisiana.
He was aboard a boat near Belle River Landing in the southern part of the state when he appeared to have a seizure, said Assumption Parish Sheriff Mike Waguespack, citing an unidentified man who was with Guist.
The reality show star then fell on the boat.
The man who was with Guist towed both his boat and Guist's boat back to the landing, called 911 and performed CPR, said Waguespack.
Guist was transferred to the Teche Regional Medical Center in Morgan City, where he was pronounced dead.
"We are extremely saddened to report that our friend and beloved member of the 'Swamp People' family, Mitchell Guist, has passed away earlier today. Mitchell passed on the swamp, doing what he loved. We appreciate your respect for the Guist family's privacy and hope you join us in sending our thoughts and prayers to his brother, Glenn, and the rest of the Guist family," the History Channel said in a statement.
So what is 'Swamp People?'
Glenn Guist is also a cast member on the show.
"Swamp People" is the popular History Channel TV series that chronicles the lives of alligator hunters in Louisiana.