Goldfish are a great fit for indoor tanks and backyard ponds, as well as for a child's first pet. Before you buy one, read our expert advice on keeping them healthy.

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.

Giant goldfish are back in the news. For decades, people have been releasing unwanted pet goldfish into Lake Erie, where they bulk up and can grow as large as a dinner plate.

Common goldfish (Carassius auratus) released into lakes, rivers, and ponds by pet owners have been wreaking havoc for decades and scientists are trying to follow the fish to solve the problem.

Why Goldfish Make The Most Interesting Pet Fish Did you know that there have been numerous studies on the benefits of starting a fish aquarium tank? While you may be quite enamored by your clever ...

Goldfish are easy pets to own, but you’ll need a proper tank, accessories and goldfish food to create the correct environment for your new pet.

A "megalodon" goldfish caught in Pennsylvania is a good reminder of why people shouldn't release their pets into the wild ...

After finding thousands of large goldfish dead in their ponds, a New Mexico city is warning you to find other places to ...

Though Cute as Pets, Goldfish Are Highly Invasive Once in the Wild The animal’s insatiable appetites, bold behaviors and adaptability make them harmful to new environments ...

The enormous goldfish were removed from a waterway in Canada, with authorities warning they are now an invasive species.

How These 3,000-Plus Invasive Goldfish Are Threatening a Whole Colorado Lake Ecosystem Wildlife officials believe a few pet fish dumped in the lake grew exponentially.