鯽魚是非常普遍的寵物觀賞魚，同時亦被大量棄養野放到各地淡水生境變成入侵物種。鯽魚的繁殖能力非常高，在野外牠們更可生長到一般的幾倍大，對原生動植物都構成威脅及造成嚴重破壞。美國多個州如明尼蘇達州、弗吉尼亞州及華盛頓州等，需投放大量資金去嘗試移除鯽魚及復育生境，當局呼籲市民切勿野放寵物。
Goldfish are very common pet fish, and are frequently released to the wild by pet owners and became invasive species. Goldfish have great reproduction rate and can grow to several times bigger than normal size in the wild; they became a threat to native species and causing serious damage. Many States in the USA such as Minnesota, Virginia and Washington states are investing great amount of money to remove these invasive species and restore the habitat. wildlife authorities warn pet owners never release their unwanted pet into the wild.
