There are well over a hundred species of marine mammals swimming, eating, playing, and living in our world’s oceans. They may breathe the air like humans do, but these amazing animals are uniquely suited to survive below the waves. This enchanting series dives into the world of these fascinating undersea denizens and explores their life cycles, interesting adaptations, physical features, and habitat. Sidebars extend the learning and entice reluctant readers to explore the text further. Full-color photographs complete this awesome underwater exploration of mammals including playful dolphins, buoyant otters, and shy manatees.