Marine turtles are a group of large, air-breathing reptiles that spend most of their lives in the ocean. They belong to the family Cheloniidae and the genus Dermochelyidae, and there are seven species of these reptiles found in oceans all over the world, except for the polar regions.
These animals are easily recognizable due to their distinctive shells, which consist of a hard upper shell, known as the carapace, and a lower shell called the plastron.