The man who was discovered injured at Ordnance Bay in English Harbour was reportedly holding a knife.
He informed the police that his injuries were self-inflicted.
Upon the arrival of Emergency Medical Services, he initially resisted their assistance.
Police found him in the water with a slashed throat and a stab wound to the chest, and his boat was engulfed in flames.
The National Parks Authority extends gratitude to Antigua and Barbuda Search and Rescue, the Fire Department, and ABDF Coast Guard for their swift response, successfully containing the blaze to the boat.