Researchers say released pet goldfish can grow, reproduce and alter shallow freshwater ecosystems once established in the wild.

Metzger Marsh, extension program leader and fisheries educator for Ohio Sea Grant and Stone Laboratory, is pictured with a giant goldfish found in Ward’s Canal near Metzger Marsh Wildlife Area in ...

LAKE GEORGE — For many, they’re a beloved pet or a prize at your local carnival. But to Upstate New York habitats, they’re an existential threat. Luckily, for fish like largemouth bass, invasive ...

"There are literally millions of goldfish in the Great Lakes, if not tens of millions," biology professor Nicholas Mandrak told The New York Times City of Burnsville via AP Giant goldfish are wreaking ...

Feeding pet fish may look simple, but it is one of the most important tasks for keeping them healthy and active. Many new fish owners think that all fish food is the same, but that is not true. Just ...