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 are actually a type of carp, and today they're some of the ...

Koi fish have got a lot going for them ... around 720 C.E.) that were originally developed into the many fancy goldfish varieties. Soon after, colorful varietals of black carp were being ...

It may shock some people to learn that goldfish can live twice as long as a dog. They’re just one of several fish species that can enjoy very long lives. This can be a blessing for owners who want to ...