In this unit, students discover the mysteries of the undersea world. Are sharks fierce hunters? Do whales and giant squids have predators? What research is being done on whales in Canada? Students discuss their favourite sea creatures, and choose one to adopt. They also present a radio advertisement for an aquarium. For their final task, students create an imaginary sea creature. They describe its physical appearance, as well as its diet, habitat, defenses against predators, and personality.