"The popular koi fish of today are actually ornamental varietals of domesticated carp," Hilstrom says ... ones can live comfortably in large indoor aquariums, but will eventually need to be ...

Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why? Koi were originally raised in Japan in the 1700s when rice farmers first began ...

The El Paso Zoo is home to a new group of koi fish, donated by Aceitunas Beer Garden, a local bar in the Upper Valley.