Are dolphin aquatic animals

Answer 1

There are two possible meanings for "dolphin" - the fish "dolphin" and the mammal "dolphin". Both are aquatic animals.

The Coryphaenidae, also called the dolphinfishes,are a family of marine ray-finned fish belonging to the Order Perciformes. Dolphinfishes are unrelated to dolphins (which are mammals) and their meat is often labeled mahi-mahi commercially to reduce possible public confusion.

The mammal dolphins are closely related to whales and porpoises. They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating fish and squid. The family Delphinidae is the largest in the Cetacean order