Each sea turtle species plays a distinct role in the ocean ecosystem. For example, green sea turtles are grazers that help maintain healthy seagrass beds. Hawksbill turtles live around coral reefs and eat sea sponges, balancing the population and providing food for other marine animals. Leatherback turtles migrate the most and help control the jellyfish population. Kemp's ridleys nest in large groups while olive ridleys exhibit arribada nesting behaviors and help fertilize dune vegetation. Loggerhead turtles provide nutrients for sea beds, and Australian flatback turtles prefer shallower waters.