How are whales and dolphins alike?
Both belong to the order Cetaceans (from the Latin word Cetus, meaning largesea animal.) There are baleen and toothed whales. Most of the largest whales (except the sperm whale) belong to the sub-order, baleen whales (Mysticeti.) They feed mostly on plankton (small floating animals) and krill (shrimplike creatures), which they strain from the sea water through plate-like baleen hanging from their upper jaws.