What family are dolphins whales and killer in?

Dolphins, whales, and killer whales (orcas) are all members of the order Cetacea. Cetaceans are a diverse group of aquatic mammals that includes porpoises, dolphins, and whales. They are characterized by their streamlined bodies, flippers, and blowholes. Cetaceans are found in all oceans and inhabit a wide range of habitats, from the tropics to the poles. They are highly social animals and many species live in pods or herds. Cetaceans communicate using a variety of sounds, and some species are known for their complex vocalizations. Cetaceans are predators and feed on a variety of animals, including fish, squid, and seals.