PBS Newshour: How massive, feral goldfish are threatening the Great Lakes ecosystem

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Goldfish are actually poorly suited for indoor aquariums. Contrary to popular belief, they do not stop growing “according to the size of the tank”; they continue to grow throughout their lifespans and unless transferred to bigger and bigger tanks, they eventually die of malformed internal organs.

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I don’t think this is worth carping about may just be a fluke of nature.

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There is a large pond (about 2-3 acres, an old clay pit) with koi carp next to my parents’ house. The biggest ones are at least 30 pounds and 30 inches long (assisted by daily feeding from my mother) and are 20+ years old.

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