Are dolphins fish? Is it a mammal

Dolphins are not fish. Although they also live in water, they are not fish. Fish have gills and can breathe directly in water, while dolphins have no gills and cannot breathe directly in water. Instead, they have to float to the water and breathe through their lungs. In addition, they reproduce differently from fish. They are viviparous animals, which are different from fish's oviparous or oviparous reproduction. Moreover, dolphins are constant temperature animals, while fish are temperature-changing animals, so dolphins are not fish.

1. Are dolphins fish?

Dolphins are not fish. They are aquatic mammals. Although they live in water and are similar in appearance to fish, their characteristics are quite different from those of fish. First of all, they breathe differently from fish. Fish breathe with gills, while dolphins breathe with lungs. They can't move in water for a long time, so they need to swim to the water regularly to take a breath.

Secondly, the reproduction mode of dolphins is different from that of fish. Most fish are oviparous, and there are also some special fish species, and the reproduction mode is oviparous. But dolphins reproduce viviparously, which is quite different from fish. Finally, dolphins are warm-blooded animals, which are similar to human habits, but most fish are warm-blooded animals. Combined with the above points, dolphins do not belong to fish.

2. Are dolphins mammals

As mentioned above, dolphins belong to aquatic mammals. They have all the characteristics of mammals, for example, they are viviparous, and after mating, female dolphins will be pregnant for about 11 months before giving birth. Secondly, after they give birth, they will always take care of the baby dolphins until they master all the survival skills, which is very similar to mammals. Besides, dolphins belong to warm-blooded animals, which are similar to most mammals.