You have to do this! You don't need gear, since all the boats have it and will loan it to you. The tropical fish are unbelievable. They gave my 16-year-old son food for them, and it was kinda of scary being surrounded by 10,000 fish, but as soon as the food was gone, they moved on. It made his day. They serve snacks (Maui chips, fruit, juice, etc.) going and coming, and it's just all around a good time.