List 5 characteristics of fish (written )

Fishes have a few characteristics. However, all fishes have certain characteristics to be able to be called a fish. 

1) Fish live in water
2) Fishes have gills to breathe
3) Fishes are vertebrates 

Here are some characteristics of SOME fishes

4) Some Fishes are cold blooded
5) Some Fishes use fins to swim

I wasn't clear on what Written Answer was so I still hope this helps somewhat! :)