You have the amphibians which are born in the water and grow into air breathing creatures, (such as the frog). Then there are the aquatic vertebrates which are wholly, or chiefly, water living creatures.
Fish, whale, dolphin, and so forth.
Because they have fins and not legs. And they breathe water and not air.
they use paired fins to move through water(:
Fish ;)
They use there fins
Fish or if you are talking about dolphins and whales then mammals as well but mostly fish
An amphibian is a cold blooded vertebrate that lives on land and breeds in water. It comes from the Greek word amphibia that means 'both lives'.
the difference is a cat has fur is a mammle and has legs a fish has scales fins and lives in water
Mudskippers do not experience any ill effects in clear water. Their name is a reference to their ability to cross expanses of mud with their strong fins.
It is a fish, not a mammal.Fish lives is a aquatic vertebrate, lives in a water, breath with gills, and most of them are cold-blooded, allowing their body temperatures to vary as ambient temperatures change.Mammals are members of air-breathing vertebrate animals, have a placenta which feeds the offspring during gestation.
A water rocket should probably have three to four fins.
Water rockets need fins because the rocket needs to stay in balance....without fins on a water rocket, the water rocket would be going out of control because it is not in balance!
A fish is a cold-blooded vertebrate that live entirely on water. Some of its adaptations include: gills and fins, tails, lateral lines and numerous number of offspring.