I can see whats happening and they don't have a clue.
otter
An animal that lives in water and has hair is a beaver. Platypus also have two layers of fur coating them.
Gold fish is one aquatic animal with scales.
An aquatic mammal is still said to have fur provided the hair coat is dense. Aquatic mammals with sparse hair, such as whales and dolphins, are generally described as having hair.
Dolphins and whales both have hair because they are mammals.
Narwhal
It is the Platypus.
Well there are many aquatic birds so ducks, geese, swans, etc...
the dolphin is the most gentle aquatic animal
Yes semi aquatic means half land animal half aquatic animal
as a noun it means an aquatic plant or animal, especially one suitable for a pond or aquarium as a adjective it means in relation to water
an aquatic animal