Cetaceans include dolphins, whales, and. but in the name of them there from the fish but not fish which is the species of mammals. Cetacea animals are mammals fully adapted to life under water. Our body has a fusiform (shaped). The forelimbs modified into flippers. The tiny hindlimbs are vestigial; they are not attached to the backbone and is hidden in the body. The tail has horizontal flukes (in fish, the tail lobes located along). The whales almost without fur, and they are insulated by a layer of thick whale fat. When overall as a group of animals, the species of whales are notable in that they have high intelligence.
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