seems many questions answered already, so I will just second diving with scuba fun. very responsive, great crew, and they pick up at the local hotels. if you like diving with sharks turtles and rays then St. Maarten is great. the landscape is full of the usual Caribbean sea life including soft and hard colored corals, the sea may be a little rocky on the surface but rarely a current underneath. there may be other diving in other places but nothing lost diving on st. maarten.