Objectives Understanding and explaining how blubber helps sea mammals adapt to cold temperatures in the ocean Identifying the mammals among a variety of ocean animals Materials Needed Ocean Animal Picture Cards Thin rubber gloves (one per student) Vegetable shortening Bowls of cold water Quart-size zip-close bag Pencils and paper Scissors Before You Begin Download, print and cut apart the set of Ocean Animal Picture Cards. Fill the zip-close bag with shortening. Introduction Hold up each ocean animal picture card, asking students to guess which animals are mammals (the whale, dolphin and walrus). Explain that whales, dolphins and walrus are not fish, but mammals that have adapted to live in the ocean. Tell students that mammals are warm-blooded and that their body temperatures must remain constant, even in the cold ocean environment. Explain that one important adaptation of ocean mammals is the blubber, or thick layer of fat, that these animals have beneath their skin.
