HomepageCategoriesAnimalsSea turtle Animals - Sea turtle - online puzzles Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines. The seven extant species of sea turtles are: the green, loggerhead, Kemp's ridley, olive ridley, hawksbill, flatback, and leatherback. 1 2 3