Whales store oil in their bones for times when there's not so much food around. Depending on how they eat and a few other factors, whales are divided into Baleen whales and Toothed whales. Baleen Whales Baleen whales have no teeth. They are filter feeders, which means they eat by straining their food through two baleen plates - huge filters growing down from their upper jaws like teeth. The baleen plates separate the whales' food from the water.
Baleens are migratory whales.
Each year they swim to warmer waters to mate, give birth and raise their young. They also have two blowholes. Rorquals include the Blue, Fin, Humpback and Minke whales. Toothed Whales Toothed whales only have one blowhole. They usually prefer to eat fish and squid, and they chew their food like we do.