Freeing your goldfish from its power may seem like a good and somewhat harmless business, but nothing could be further from the truth. In the US state of Minnesota, the authorities appealed to the owners of aquariums. The question is to stop the release of fish into lakes and rivers after taking a huge goldfish out of the waters in several places.
In Burnsville, near Minneapolis, several huge goldfish, which can grow to several times their normal size, were recently recovered from the water. Officials warn that the “feral goldfish” can destroy other species of fish and plants.
“Don’t release your pet goldfish into ponds and lakes!” He reads the call in Burnsville. “It’s bigger than you think and contributes to poor water quality by fertilizing bottom sediments and uprooting vegetation.”
Like carp, goldfish can easily reproduce and survive during Minnesota winters due to low oxygen levels. The Minnesota Department of Natural Resources warned that “some goldfish may appear to be a harmless addition to local aquatic life to some, but they are not.”
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Goldfish can grow from 5 to 12 cm per year, depending on the living conditions. If the living conditions are poor, as in a small bowl, the goldfish will not grow.
Environmental destruction from releasing pets into an aquarium is not new. For example, the carnivorous lionfish, native to the Pacific but believed to have been released by Florida pet owners after Hurricane Andrew in 1982, has already killed dozens of species from the Caribbean, allowing seaweed to overrun the reef.
In scientific studies, goldfish have received less attention than other invasive species, such as Asian carp. Goldfish warning is not only in Minnesota, but also in Virginia and Washington, as well as in Australia and Canada.
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