TAVERNIER, Fla. – Officials say a Massachusetts tourist died while lobster diving off the Florida Keys.

Monroe County Sheriff’s detective Mark Coleman says 54-year-old Mark Fountain died Wednesday, during the first day of the two-day season.

Fountain, of Montgomery, Mass., was an experienced diver who was on a private boat with his 34-year-old son and the son’s girlfriend. They went scuba diving but became separated in the water. The son, whose name was not immediately available, told deputies he got in the boat, picked up his girlfriend and looked for his father. They found him floating, unresponsive in the water.