The Turtle and Stingray Pool complex comprises of two pools. The lower pool which holds stingrays and adult turtles, has a central sandy island specially designed to serve as the turtle's laying area during the summer breeding season. The Underwater Observatory Marine Park is the only institution, worldwide, which successfully breeds and rears Hornbill Turtles in captivity. When the turtle eggs hatch, the young are removed to a special adjacent aquarium. At a later stage, the juvenile turtles are brought back to the complex and can be watched swimming in the upper pool.

Apart from Horbill Turtles, there are three species of stingray which swim at the bottom of the pool and which can be seen hand-fed.