Cetaceans (Cetacea)
Cetaceans are a diverse group of aquatic mammals that include whales, dolphins, and porpoises. They have a streamlined body shape, blowholes for breathing, and flippers for swimming. They range in size from small porpoises to the large blue whale, and can be found in a variety of aquatic habitats including oceans, rivers, and estuaries. Cetaceans are carnivorous and their diet typically consists of fish, squid, and krill. They display a wide range of behaviors and many species engage in cooperative hunting and other social behaviors. There are around 90 species of cetaceans, divided into two suborders: the Odontoceti (toothed whales) and the Mysticeti (baleen whales).
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