Porpoises can act in a coordinated fashion even when they are hundreds of feet apart, using echolocation for finding prey and staying together in a pod, but do not use it to communicate as often as dolphins do. In contrast with dolphins, there are much fewer species of porpoises in the world. The dorsal fins on dolphins are usually curved or hooked, while those on porpoises are more triangular in shape. Please try Author: NOAA Msg & data rates may apply. Dolphins and porpoises even have hair, but nearly all of it is lost shortly after birth. Our ocean faces many threats like the onslaught of ocean trash, overfishing and ocean acidification. Of the three types of fins found on dolphins and porpoises, only the pectoral fins (flippers), which are used for stopping and steering underwater, contain bones. If a dolphin or porpoise species reaches more than 30 feet, they’re referred to as whales. The small external ear opening is about two inches behind the eye in both animals. Porpoises are usually smaller (1.5 - 2.5 m) but stouter than dolphins. The teeth of the two animals offer an easy way to tell them apart. Dolphins belong to the Delphinidae family and are up to 30 feet long. Dolphins have a round, bulbous "melon" in the head and elongated jaws that often form a distinct beak. Most scientists agree that there are 32 dolphin species (plus five closely related species of river dolphin) and only six porpoise species. Dolphins and porpoises are some of the most charismatic critters in the ocean—but can you tell them apart? Check them out below, then show off your knowledge next time you see one in the wild. Dolphins are marine mammals closely related to whales and porpoises. The smallest toothed whale is the vaquita, an extremely endangered species that only grows to about four feet and 120 pounds. Males of both species have two genital openings on their ventral side, while females have four: two for their sex organs and two for lactation, with teats found inside the body. All of those statements really do make them sound like they have the same frailties as Humans. Text HELP to 69866 for more information. The dolphin’s hooked or curved dorsal fin (the one in the middle of the animal’s back) also differs from the porpoise’s triangular dorsal fin. It's difficult to see in the common species on the coast of B.C., but dolphins often have a longer rostrum (beak) compared to porpoises. 24 Nov 2020. en.wikipedia.org/wiki/Porpoise. Porpoises, belonging to the Phocoenidae family, are smaller and stouter, with other anatomical differences. Dolphins usually have a beak that makes them appear \"long-nosed,\" while porpoises do not have a beak and thus appear more \"flat-faced.\" The dorsal fins on dolphins are usually curved or hooked, while those on porpoises are more triangular in shape. They are usually around 5 feet to 8 and a half feet long. Last updated: 11/05/20 And, like almost all mammals, they give live birth to their young and nurse their offspring. Porpoises are generally smaller and stouter, which explains how the name porpoise originated–from the Latin porcus, meaning pig and piscus, meaning fish. Though both animals are very intelligent, dolphins are deemed to be more social and live in larger, more stable groups. Calves are weaned after about a year. Porpoises are relatively shy and are seen alone or in groups containing a few individuals. Despite their differences, dolphins and porpoises face a number of similar threats, including entanglement in fishing gear, climate change, ship strikes, pollution and habitat loss. Dolphins and porpoises have many similarities, one of which is their extreme intelligence.
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