We took a two hour trip with the Atlantis Submarine. You meet at the office in Havensight and from there they take you to a boat. On the boat ride out to the submarine there is water and rum punch available, along with a bathroom. Once you board the submarine, there is no bathroom and no moving around.
We saw sting rays, sharks, a green moray eel, and many other beautiful fish. They take you from 60' - 90' down along the reef where most of the fish are. The people on the other side of the sub did see turtles also. It was a fun way to explore the ocean and see many fish without getting wet at all!