oki Beach is a popular beach on St. Thomas for its Crystal Clear water and its beautiful white sand. Extensive reef make it ideal for snorkeling, swimming, and diving. Coki Beach also have water sports and equipment rentals such as Wave Runners, Parasailing, Scuba Diving, Sea Trekkin, Chairs, umbrella and snorkeling rental. Coki Beach also hosts the world famous marine park Coral World underwater observatory that houses the predator tank.