Aside from their quick growth and disruption of water quality, goldfish spawn several times a season and have no natural ...

"One goldfish might not seem like a big deal, but they multiply fast," the USFWS said. "Goldfish spawn several times a season, and because they have no natural predators in most North American ...

The goldfish move into their spawning grounds when temperatures hit about 50 degrees Fahrenheit and understanding this movement can help environmental officials pinpoint regions for culling.

"One goldfish might not seem like a big deal, but they multiply fast," the USFWS said. "Goldfish spawn several times a season, and because they have no natural predators in most North American ...