Larimer writes: Like other species of carp, the domestic goldfish … This, obviously, exacerbates the problem of goldfish being introduced into the wild. The goldfish (Carassius auratus) and its many forms were bred originally from the wild gibel carp, a species that closely resembles the crucian carp. The fish have filled West Medical Lake, along with Koi, … The Alberta government has just issued a plea asking goldfish owners not to release their discarded pets into the wild. The almost 90,000 pounds of goldfish caught in Michigan in 2015 brought in nearly $70,000 in revenue. The species is so prevalent in the warm, shallow waters of western Lake Erie that it's now a commercial catch with over 113,800 pounds of goldfish netted in 2015. 2 of 7 At least once per year, the Water Resources Management Team must spend time and funding resources to remove a population of an aquatic invasive species that someone has released. Goldfish were first selectively bred in China 2,000 years ago for food. Commercial fishermen on the Great Lakes have started making a profit from the invasive species. They tend to start bullying or attacking other fish that show signs of weakness. Turns out, goldfish are one of the world's worst invasive species. Pet Goldfish Become Invasive, Soda Bottle-Sized Menaces When Released into the Wild In the wild, goldfish can grow to be the size of footballs and wreak havoc on the ecosystem The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes.It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish.. Invasive aquatic species such as goldfish disrupt the balance of natural communities, deplete native resources, and may have a negative effect on water quality. Caulerpa is listed as an invasive species by the US Plant Protection Act. 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