Wooden TurtleDid you know that the largest sea turtle, the leatherback turtle, can weigh up to 900kg! Turtles aren't silent. Depending on the species, they can make a range of noises, anything from chicken like clucks to dog like barking. As reptiles, sea turtles breathe air but they have the ability to remain submerged for hours at a time and even sleep underwater. They spend their entire life at sea, only returning to nesting beaches to lay their eggs, although