There are about 75 species of cetaceans, including the whales, dolphins, and porpoises. Just click on an underlined whale to go to that information sheet. They live in frigid arctic and subarctic waters, but many migrate to warmer water in the summer. Balaenoptera musculus is the largest animal that ever lived on Earth - even bigger than any of the dinosaurs. They eat krill and small fish.
Blue whales are an endangered species.
They are an endangered species. It that has a very large head and large teeth. They are deep divers and eat squid, fish, octopus, eels, etc. Balaenoptera physalus is a very large baleen whale, the second largest animal in the world. Gray whales migrate from Alaska to the Baja peninsula in winter.