Why is a dolphin not a fish? There are many reasons why dolphins are not classified as fish. From there classification to the way they breathe. Though these creatures are very different, they do have few similarities. To begin, dolphins and fish have very different classifications. Dolphins are actually classified as a type of whale, which are classified as mammals, while fish are classified as Pisces. There are 12 different warm-blooded species of dolphin as opposed to the 20,000 cold-blooded species of fish.Secondly, the birth process of dolphins and fish are very different. Dolphins for instance have internal fertilization. Live births take place and afterwards the young are taken care of. On the other hand fish have external fertilization. Once the eggs are hatched the babies are not taken care of.The bodies and movement of these two animals are also different. Dolphins have a smooth body and swims with the up and down movement of their tail. Fish have scaly bodies and swim with a side-to-side movements of their tail. Breathing methods also differ. Dolphins breathe from the air through the blowholes on the top of their heads. Fish breathe from the water through gills on the sides of their head.Though there are many differences between dolphins and fish, they do have few similarities. Such as, they are both threatened by humans, they will both die if out of water too long, and they are both found in fresh and salt waters. With all these differences and few similarities, this answers the question “Why is a dolphin not a fish?”...
