![]() Why Dolphins Are Not Fish The general anatomy of a dolphin. By examining dolphins’ specific characteristics, it is possible to prove their status as mammals, while simultaneously disqualify them from the fish class. However, despite their aquatic nature and lifestyle, dolphins have a number of distinct characteristics that separate them from fish. Their furless bodies, sleek shape, and fins, are often mental clues that these animals are most similar to fish. Similarly, many marine animals, including whales, are often thought to be very large fish. Many people view dolphins in a similar category to sharks, and thus assume they would be classified in the same way. ![]() One of the reasons dolphins are sometimes confused for fish is that sharks are fish, and not mammals. Why Dolphins Are Wrongly Considered To Be Fish While it can be tricky placing certain marine life into either the mammalian or fish categories, there are certain clues which help in classifying dolphins, and other sea life, into their respective groupings. Dolphins are members of the infraorder Cetacea, which is reserved for marine mammals, such as dolphins, porpoises and whales. Despite spending their lives almost completely underwater, and appearing in most ways like fish, they are actually mammals. Dolphins do not possess gills, and instead must surface to breath air through blowholes on the tops of their heads or back.Dolphins are warm blooded, and have mammary glands.Yes, dolphins are classified as mammals and not fish.
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