We began keeping goldfish as pets more than 1,000 years ago, but their beauty wasn’t the only thing they had going for them.

Goldfish are hardy, fairly simple to care for, and eye-catching, so it’s no wonder they’re popular pets. These passive freshwater fish are ideal for renters who can’t have other types of pets, ...

Zookeepers have proposed a real “grizzly” solution to controlling giant invasive goldfish. For years, pet goldfish released into US waterways have been wreaking havoc by ballooning to gargantuan sizes ...

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. The U.S. Fish & Wildlife ...

A bigger-than-usual discovery in Pennsylvania has prompted officials to warn what happens when "cute" turns to "brute" — as they're reminding the public that leaving a pet goldfish in the wild can ...