Koi may just look like an oversized goldfish, but they're not even remotely related. Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world.
Cheryl Vetter notes it's possible for koi to live up to 100 years, although 20 to 30 years is more typical. Besides koi, goldfish, another type of carp, thrive in backyard ponds and live peacefully ...
The fish, he explained, was a hybrid of a leather carp and a koi carp and after a 25-minute battle, it was all over. The goldfish that had been a white whale to many was in Mr Hackett's net.