Goldfish, as voracious eaters, will devour snails, small insects, fish eggs, and young fish, out-competing native fish. They can also grow over a foot long outside in the wild. (Pictured: A 14-inch ...

Pet goldfish released into the wild are wreaking havoc on native species, according to new research. Once out of the aquarium tank and let loose in open waters, they can turn into fat two-foot long ...

Pet goldfish may pose a “triple threat” to native biodiversity and releasing them could lead to “catastrophic outcomes”, a new study from the North has shown. The study, led by James Dickey from the ...

PET goldfish released into the wild have "insatiable appetites" and eat up other species' resources, new research has found. The study by Queen's University Belfast found that unwanted fish released ...