Goldfish which have escaped from ponds or been illegally released are breeding with Britain's only native carp, the crucian carp, and threatening its future, the agency said on Tuesday.

The good news is that carp populations have severely declined over the past several years in Hamilton Harbour. But goldfish have moved in to replace them and they are causing new problems.

To survive through winter in the freezing, oxygen-starved waters of northern Europe, crucian carp and goldfish produce their own alcohol internally, removing dangerous chemicals from their bodies ...

A fisherman from the U.K. caught a massive carp that looked like an irregularly sized goldfish in a lake in France earlier this month. The bright orange fish weighed in at 67.4 lbs and was ...

If given lots of space, with the proper diet and water conditions, carp species, including goldfish and koi, have the potential for a large amount of growth, which explains Carrot's impressive size.

People can soon start dumping their pet goldfish, carp and other unwanted fishy pets in a designated "amnesty" pond near San Francisco Presidio's Mountain Lake.

The US House approved a $300 million budget to help restore the Great Lakes, which are still being impacted by the unpredictable presence of invasive species.

A pet fish released into Lake Elysian is now believed to be the reason thousands of the lake's carp died last month.

Joe Selover, of North Syracuse, caught this 14 1/2-inch goldfish in Onondaga Lake with his fly rod.

A fisherman from the U.K. caught a massive carp that looked like an irregularly sized goldfish in a lake in France earlier this month. The bright orange fish weighed in at 67.4 lbs and was ...