Sea turtles are found in warm seas throughout they world. These turtles are found in shallow waters near the coast, bays, lagoons, and estuaries. Some are also found in the open sea, the young are usually found closer to the coast. Sea turtles lay eggs. Each species is at a different age when they reach sexual maturity. In hawkbills it can be as early as 3 years old in longerheads it is 12-30 years old, and in green sea turtles its 20-50 years old. Female sea turtles come ashore to lay 50 to 200 eggs which are soft shelled and leathery in texture. The female covers the eggs with sand. These sea turtles usually return to the same beach to nest every year. The size of the sea turtles depends on the species. Each varies in size. Green Sea turtles can weigh about 400 pounds and can grow to 45 inches long. Black Sea turtles are about 278 pounds. Leatherback sea turtles can grow to be over 1,000 pounds and are over 6 feet tall. They are the largest. The organisms sea turtles eat depends on the species. They eat sea grasses and algae, sponges, shrimps, squids, crabs, molluscs, jellyfish, sea weed, cuttlefish, and sea cucumbers. Humans are the main predator to sea turtles. Baby sea turtles are also eaten by fish, frogs, minks and snakes. Their eggs are eaten by scunks and raccoons.