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 popular koi fish of today are actually ornamental varietals of domesticated carp," Hilstrom says ... predator when you hang out around the side of the pond. Start by throwing some food ...

Almost £1 million worth of rare koi carp collected by the late Freddie Mercury have been accidentally killed by a gardener. The Queen star's 89 fish, each more than 2ft long, were worth about £ ...

koi carp caught by Raphael Biagini in ... Freshwater Fish Ever Recorded "I knew it was a big fish when it took my bait and went off side to side and up and down with it. Then it came to the ...