Their cells can be red, yellow, black, white, blue ... and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish, but they're not even remotely related.

Koi Fish in Aiea have been kidnapped and police are asking for the public’s help in helping solve this case. According to ...

"The popular koi fish of today are actually ornamental varietals of domesticated carp," Hilstrom says. "Black carp originate from China and were first bred for red color mutations (noted around ...