A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale). Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).

2025年1月25日 · Mammalian dolphins are any of the toothed whales belonging to the mammal family Delphinidae (oceanic dolphins) or the mammal families Platanistidae and Iniidae (river dolphins). The name dolphin is also applied to members of the fish genus Coryphaena (family Coryphaenidae), also known as mahimahi.

Living in pods that can number a dozen or more, dolphins are intensely social mammals that communicate with squeaks, whistles, and clicks. Whether dolphins have language, as humans do, is a topic...

2020年10月16日 · Yes, dolphins are mammals and not fish. Despite spending their lives almost completely underwater, and appearing in most ways like fish, they are actually mammals. Dolphins are members of the infraorder Cetacea, which is reserved for marine mammals, such as dolphins, porpoises and whales.

2024年3月9日 · Even though they live in the ocean, dolphins and whales, unlike sharks, are marine mammals, not fish. 1 They’re mammals because they breathe air through their lungs, and because they are warm-blooded animals and need to use their metabolism and energy to stay warm. 2 They also give birth to live young and feed their babies thick pasty milk throu...

Between these four families, there are 40 distinct species of dolphin. All oceans, seas and many rivers. Fish, squid. Some species like Killer Whales might eat seals & turtles & other marine mammals. The 40 different species can be found in a vast geographic region, which makes it very difficult to estimate the current population of dolphins.

Dolphins are small-toothed mammals classified in the same scientific order called “Cetacea” as porpoises and whales. There are 17 different genera and about 40 species of dolphins. They can be discovered in oceans or coastal brackish waters worldwide.

Discover if dolphins are mammals or not with these 5 dolphin facts. Are dolphins mammals? Learn why these creatures are classified as marine mammals.

Dolphins are aquatic mammals of the infraorder Cetacea that constitutes five families, including oceanic dolphins, the Indian river dolphins, brackish dolphins, the New World river dolphins, and the extinct Chinese river dolphins.

Dolphins (Delphinidae) are aquatic mammals related to whales and porpoises and famous for their intelligence, apparent compassion and joy. There are almost 40 species of dolphin in 17 genera. Dolphins vary in size from 1.2 metres (4 feet) and 40 kilograms (88 pounds) (Maui’s Dolphin), up to 9.5 metres (30 feet) and 10 tonnes (the Orca).