Visual Encyclopedia

Fish

Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a , but not a phylogenetic classification.

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Rosetail Half-Moon Betta Fish

This is so pretty!

Contributed by Darby Oliver

Yellow Boxfish

Hmmm…. I wonder why its called that!

Contributed by Darby Oliver

Bubble-Eye Goldfish

A cute goldfish with puffed cheeks making their eyes "bubble".

Contributed by Darby Oliver

Sphere

School of fish form a sphere!

Contributed by Darby Oliver

Translucent Goby Fish

A fish that is completely clear. You can see all of its organs!

Contributed by Darby Oliver

Pretty scary stuff!

Thankfully this guy is hanging out at extreme ocean depths!

Contributed by Josh Milligan

Prehistoric looking shark!

Not sure I want to play in the ocean anymore!

Contributed by Josh Milligan

River Monsters

a fish that has pig features

Contributed by Sade Izundu

Creative way to teach your fish to play.. I guess o.O

Contributed by Johanna L Garcia

Weedy Scorpionfish

Contributed by Jessica Kalmazu Stimely

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