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[[Image:Fishes.jpg|left]]

[[Image:Fishes.jpg|thumb]]

'''Fish''' are aquatic cold-blooded [[vertebrates]] with fins and scales. Many [[species]] of fish are often kept as pets in containers known as [[aquarium]]s.  Fish are generally divided into two groups: [[freshwater]]-dwelling and [[saltwater]]-dwelling, and fish from one group are generally unable to survive in the environment of the other.  There are, however, a small number of species that move between saltwater and freshwater at different stages of their lives.  Humans consume several types of fish, which is a source of animal protein.

'''Fish''' are aquatic cold-blooded [[vertebrates]] with fins and scales. Many [[species]] of fish are often kept as pets in containers known as [[aquarium]]s.  Fish are generally divided into two groups: [[freshwater]]-dwelling and [[saltwater]]-dwelling, and fish from one group are generally unable to survive in the environment of the other.  There are, however, a small number of species that move between saltwater and freshwater at different stages of their lives.  Humans consume several types of fish, which is a source of animal protein.

The largest freshwater fish ever found was a 646-pound giant [[catfish]] found in the Mekong River in [[Thailand]] in 2005. [http://news.nationalgeographic.com/news/2005/06/photogalleries/giantcatfish/]

The largest freshwater fish ever found was a 646-pound giant [[catfish]] found in the Mekong River in [[Thailand]] in 2005.<ref>http://news.nationalgeographic.com/news/2005/06/photogalleries/giantcatfish/</ref>

[[Image:LemonTetra.jpg|thumb|right|Lemon Tetra tropical fish]]

[[Image:LemonTetra.jpg|thumb|right|Lemon Tetra tropical fish]]

== Types of fish ==

== Types of fish ==

[[Image:Cod.jpg|thumb|A Cod]]

[[Image:Cod.jpg|thumb|A Cod]]

*[[Cod]]

*[[Cod]]

*[[Puffer fish]]

*[[Puffer fish]]

*[[Shark]]

*[[Shark]]

* [[Ship]]

* [[Ship]]

* [[Anabantids]]

* [[Anabantids]]

==References==

==References==

{{reflist|2}}

{{reflist}}

== External links ==

== External links ==

*[http://www.infovisual.info/02/033_en.html Fish Anatomy]

*[http://www.infovisual.info/02/033_en.html Fish Anatomy]

[[Category:Fish]]

[[Category:Fish]]