How is fish calssified?

Question

According to origin and fat.

Answer 1

Kingdom: Animalia
Phylum: Chordata
(unranked) Craniata
Subphylum: Vertebrata

Answer 2

Well, fish really aren't classified that way. They're classified according to how they are similar to and different from other types of animals and to each other. They are an animal (Kingdom) as opposed to being a plant or fungus. They belong to the Phylum Chordata (they have a nerve chord and a notochord of some type during some stage of their life). They are in the subphylum Vertebrata, meaning they have a backbone of some type of material. From here, they are put into different groups depending on the type of skeleton (bone or cartilage), presence or absence of a moving jaw, and type of fins (lobed or rayed) each has. See the links below for more info:

http://www.spart5.k12.sc.us/techtraining/teacher/webpages/SCFish/fish_classification.htm
http://en.wikipedia.org/wiki/Fish#Classification
http://cichlidresearch.com/fish_html/allfish.html

Answer 3

Kingdom: Animalia Kingdom
Phylum: Chordata.
Subphylum: Vertebrata.
Class:Agnatha, jawless fish such as the hagfish and lampreys
Chrondrichthyes, fish whose skeleton is made of cartilage such as sharks, rays and skates; and
Osteichthyes, fish whose skeleton is composed mostly of bone such as bass, perch, catfish, and flounder.
Subclass: ray-finned group (e.g., perch, and catfish) and
lobe-finned group (e.g., lungfish)

And it goes on further down from here.