Sea turtles are coldblooded reptiles that live in oceans. Even though sea turtles live in the ocean, they are related to land turtles. Sea turtles breathe through lungs and have a 3 or 4 chambered heart. A sea turtles shell can protect it from their enemies. Humans are the main predators of turtles, but fish, frogs, snakes, minks, otters and birds such as crows eat their eggs.
Sea turtles don't have teeth, though do have hard jaws which can leave a small bite mark. Sea turtles have paddle-like flippers. Their flippers are great for getting them through the water. They also breathe air, so a sea turtle must come to the water surface when it needs to breathe, which can leave them able to see from boats. There are seven species of sea turtles. Six of them (the hawksbill, green, flat back, loggerhead, Kemp's riley, and olive riley have shells made up of hard scuttles, while the aptly-named leatherback turtle has a shell that is as hard as leather. All sea turtles and all turtles lay eggs. Sea turtles hatch from eggs on shore and then spend several years out at sea. It may take 5 to 35 years for them to become a grown turtle, depending on the species. At this point, males and females migrate to breeding grounds, which are often near nesting areas. Males and females mate offshore, and females travel to nesting areas to lay their eggs. Ashleigh
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