Marine animals have adapted to their habitat over millions of years. Huge whales and giant squids have been able to grow exceptionally large despite the absence of strong limbs due to the buoyancy of living in salt water. Blubber keeps some animals warm in the deep as other adaptations let animals live in very warm waters. Readers dive into the complex and fascinating subject of life under the sea through 20 interesting facts about how bodies, predation, camouflage, and more have evolved below the surface.