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Koi Carp.
Koi fish is domesticated version of common carp. This fish is most famous by its beautiful colors that have been created via selective breeding. There are over 20 different varieties of koi fish that differ in color, patterns and type of scales. Koi fish originates from Eastern Asia. This fish lives in fresh waters. Thanks to its beauty and increased popularity in the past century, koi fish can be found in the ponds throughout the world. Since koi fish is numerous and kept in private aquacultures, it is not on the list of endangered species. Original public domain image from Flickr
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