There were no injuries, according to Dauphin Island Fire Chief Brad Cox. Everyone was off the boat -- which is the Emerald Key, a 45-foot fishing vessel -- when emergency responders arrived on the scene, Cox said.
Cox said the call came in at 6:11 p.m. that there was a boat on fire in the channel in the Dauphin Island Bay.
He said it appears a systems failure caused the fire.
That's near the Dauphin Island Harbor House, in the water just off Hubert Street and Cadillac Avenue in an area from the marina to Billy Goat Hole.
Cox said the boat was tied or anchored in the channel.
Fowl River firefighters, the U.S. Coast Guard and Dauphin Island Fire all responded, and the fire was extinguished.
Cox said the channel is going to be closed while the Coast Guard checks for environmental problems. Then they will call the owner to remove the vessel, Cox said.