It is included. They give you mask, snorkel and a vest. You get a short instruction on one end and then swim in a forward motion to the other. You may zig zag but not go backwards. Large rock in middle to squat on if you get tired. Water is cold. Fish & shark for the most part stay towards the bottom. You may not dive down. I highly suggest you do this early. As the day progresses and it gets more crowded not only do you have to go "faster" because of the crowds, but the sediment is stirred up and it isn't as pretty. Take a waterproof camera, fun to have on slides but have some good shots of Shark Reef too !