Sea turtles have a diet consisting of seaweed, plankton, coral, jellyfish, shrimp, crabs, mussels and algae. They typically live 40 years, mate every 3 years and females lay around 100 eggs every 2 months. Sea turtles face threats from predators like sharks and humans, as well as plastic bags and fishing nets. They live in warm ocean waters around rocks, mud and coral, and one population lives in Shark Bay, Australia. Sea turtles can weigh up to 100 pounds and are known for their green fat and ability to shed water quickly through their eyes.