They highlighted the problem by sharing images of goldfish that had grown to enormous size after their release, damaging water quality and plant life in lakes. What Do Goldfish Eat?

The viral photo raises questions about a longstanding goldfish myth. Inverse speaks with experts about the fishy science surrounding goldfish growth and size.

The tiny goldfish you can pick up at pet store for a few cents might not look like an environmental threat, but they can grow into a huge problem if set free in lakes or ponds — mainly because ...

An ecology nonprofit recently captured a goldfish in a New York river that was the size of a kitten.

As you can see from the photo from Minnesota, goldfish can grow to the size of a football. The fish then compete with native species for food and increase algae in lakes.

A 14-inch goldfish found in a river shows why you shouldn't flush these pets down the toilet, according to a nonprofit.

Far from being an innocuous pet, little goldfish set free in fresh water are an invasive species that can grow huge and destroy ecosystems. They've triggered official warnings from all over ...