Socially dolphins tend to be more vocal and physically active with their behavior than porpoises. Comparatively, porpoises are generally much smaller than many of the dolphin species and vary in size from around 4 1/2 ft. Porpoises also have stockier bodies than some dolphin species and an overall smaller dorsal fin.ĭolphins can range greatly in size from 4 ft. Porpoises, on the other hand, have bulbous-shaped heads with spade-shaped teeth that lack a beak and their necks are fused and immobile. Many dolphins have streamlined bodies, beak-shaped mouths with conical-shaped teeth, and flexible necks for moving their heads and observing their surroundings. First of all, with around 40 known dolphin species, there is much greater diversity within the dolphin family than the 6 species of known porpoise. When it comes to the differences between the two species, several factors help differentiate dolphins from porpoises. Dolphins and porpoises may also consume some of the same common foods, including fish, squid, and various crustaceans.įinally, Both ocean animals can use echolocation to help them identify other pod members, communicate and hunt for food. Because dolphins and porpoises are marine mammals, they both breathe air, are warm-blooded, give birth, and nurse their young with milk. When it comes to the similarities between dolphins and porpoises, these marine mammals share several similar characteristics. However, the baleen whale species is made up exclusively of large whales that possess baleen plates with bristles instead of teeth and are born with two blowholes instead of one. All dolphin and porpoise species, along with numerous whale species, belong to the toothed whale suborder as they all possess teeth and are born with a single blowhole. These two suborders are known as the toothed whale and baleen whale suborders. The cetacean family is categorized into two suborders based on the physical characteristics of various species. In fact, the cetacean species consists of over 80 different marine mammals and is made up of all species of whale, dolphin, and porpoise. For instance, both species are marine mammals and belong to the cetacean family. Both species share many similar characteristics when it comes to dolphins and porpoises.
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