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

The official USFWS website explains that although goldfish in pet store tanks may look harmless, "in the wild, they don’t stay small." "Without a tank limiting their size, goldfish that once fit ...

While your goldfish may look tiny now, without a tank limiting its size, the Fish and Wildlife Service says it can balloon into a "football-sized" invader. The agency says a single goldfish ...

One of the most persistent myths about goldfish is that they only grow to the size of their tank. While there's a grain of ...

The tiny, harmless-looking fish from the pet store won't stay 'cute' without a tank limiting their size. 'Goldfish that once fit in the palm of your hand can balloon into giant, football-sized ...

ERIE, Penn. (WKRC) — Pet store goldfish are not only surviving the harsh winter conditions of Lake Erie, but are thriving, officials said. The United States Fish and Wildlife Service posted a ...