Goldfish possess genetic traits that allow them to swell up to four pounds—the size of a Chihuahua. Experts say that's why you shouldn't release them into the wild.

If you can no longer care for a live goldfish, the United States Fish & Wildlife Service recommends trying to find another ...

Goldfish may look small and cute in your home, but in the wild it's a different story. Releasing them into your local stream or lake is a bad idea. Following is a transcript of the video.

(WJW) — Lake Erie looks like a frozen tundra, but beneath all of that ice goldfish are not only surviving, they may be thriving and growing to massive sizes. Biologists with the U.S. Fish and ...