Officials with the Arizona Game and Fish Department suspect illegal stocking is to blame for the discovery of carp in Roper Lake.
The agency says 11 fish ranging in size from 19 to 21 inches were found in the lake in just six hours.
The fish aren't native to Arizona. They eat both plants and animals and their bottom-feeding habits can be destructive to aquatic resources. They can also introduce diseases and stress young native fish.
Officials say it's illegal to transport or release live fish into any body of water without the department's approval.
Non-native fish -- such as rainbow and brown trout as well as bass and channel catfish -- are stocked to Arizona waterways by Game and Fish for recreational sport fishing opportunities.
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