Unlike other turtles, sea turtles can’t retract their flippers and head into their shells. In the water their rear flippers are used as rudders and steering so they are very agile and graceful swimmers.
There are 7 species of marine turtles. Hawksbill, Loggerhead, Leatherback, Olive ridley, Green, Flatback, and Kemp’s ridley and 6 of them are endangered. Turtles don’t have teeth so they use their beak-like mouth to grasp food. Their turtle shells are made of over 50 bones fused together and light spongy bones that help them float.
Turtles may look like they are crying but they’re actually getting rid of excess salt through a salt excretion gland near the corner of their eye. But there is scientific evidence that turtles may experience feelings of depression and may be affected by despair and boredom because of bad nutrition, substandard living conditions or medical issues.