And the better-looking the fish, the more a buyer is willing to pay. Yvo: Yeah, it depends. You can buy some small and cheap koi fish for a couple of bucks, but also, yeah, it can get up really ...

Koi aren't lightweights either; they typically tip the scales around 35 pounds (16 kg), and experts advise filling a pond with about 500 to 1,000 gallons (1,893 to 3,785 liters) of water per each ...

The smallest fish in the world One of the strongest contenders for the smallest fish is Paedocypris progenetica.The smallest mature female of this species was found to be just 7.9 millimeters (0. ...