There are hundreds of different animals living in the ocean. Each of these animals has a different way to survive. Some, such as jellyfish, use a painful sting to make other animals stay away. Some animals use special coloration to hide even when there's nowhere to blend in. From the smallest fish to the largest mammals in the world, all marine animals have adapted to life in their habitat. Through this exploration of ocean life, readers will discover how animals coexist in their ecosystem and survive.