Readers learn what helps a mammal survive the depths of the cold, populous oceans. They’ll examine the adaptive features and diets of marine mammals, and explore their distinct methods of reproduction and nurturing. Climate change and its risk to marine mammal and environmental preservation is covered. Vocabulary call-outs throughout the narrative, along with a separate glossary after the main text, will help improve the language skills of readers, while thoughtful and comparative questions create connections between other types of animals. Stunning photography coupled with research-focused content combines for an experience that will give readers a greater understanding of our world.