Sloths move so slowly a coat of algae forms on their fur coat. They sleep 20 hours a day. The coat of algae helps camouflage them from predators. Sloths are so used to climbing in the trees that they can barely walk on the ground- they have to drag themselves around with their three long claws on each hand. Their diet is vegetarian, mainly leaves and berries, and it can take up to a month for the food to pass completely through their bodies. Other slow animals include armadillos and anteaters.