From Trip Advisor. Possibly a shore dive.
Google Translate
"COZUMEL, 26 December.- dies a tourist in Cozumel. An alien 60 years died in a diving beach in the resort Villablanca by momentarily unknown causes suddenly began to feel ill and brought him water to give first aid, but unfortunately died.
White balance in this holiday season does not exist in Cozumel, the death of two people raised at this time, for various reasons. Now the death of a California tourist named Sean Davidson, 60, whom the preliminary data indicate that the sea was taken at 15:50 hours because of an alleged decompression occurred."
Google Translate
"COZUMEL, 26 December.- dies a tourist in Cozumel. An alien 60 years died in a diving beach in the resort Villablanca by momentarily unknown causes suddenly began to feel ill and brought him water to give first aid, but unfortunately died.
White balance in this holiday season does not exist in Cozumel, the death of two people raised at this time, for various reasons. Now the death of a California tourist named Sean Davidson, 60, whom the preliminary data indicate that the sea was taken at 15:50 hours because of an alleged decompression occurred."