Goldfish possess genetic traits that allow them to swell up to four pounds—the size of a Chihuahua. Experts say that's why ...

Goldfish look pretty small in the pet store, but without a tank to limit their size, they can grow up to ... color mutation was observed in silver carp. The gold individuals were then selectively ...

Initially bred from carp, their golden hues became ... One of the most persistent myths about goldfish is that they only grow ...

The goldfish will also reproduce with the native common carp to create bigger hybrid species that are equally harmful. The problem has been very pronounced in the Great Lakes between the United ...