Why are carp such an invasive species? They have also taken over a lake near my house.



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    There are a few types of carp that have been imported and have all ended up being invasive species.  The grass carp was brought in to control algae but instead ate huge quantities of submerged aquatic vegetation, damaging the ecosystem and limiting the food supply of other animals.  Similarly, asian carp can become quite large and thus eat a lot, taking over the food niches formerly occupied by indigenous fish.  They are salt tolerant and can handle cold water so there is little to prevent them traveling and spreading via rivers and canals into the Great Lakes.  In short, they are bigger, stronger, and eat more than most of the fish they are out-competing.

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