Turtles are reptiles that live both on land and in water. There are over 300 species of turtles worldwide. Turtles have shells and no teeth. Tortoises are a type of turtle that live exclusively on land. Baby turtles hatch from eggs and make their way to water, then they spend up to 10 years in the ocean before returning to land as juveniles. Females return to nesting beaches where they were born to lay eggs. Turtles can live up to 100 years.