Red swamp crayfish (Procambarus clarkii) is listed as a prohibited species in the state of Michigan. As a result, this means that selling, importing, cultivating or transporting this species is not allowed.

Michigan has five species of native and invasive crayfish, however, this invasive species can be distinguished by the bright red raised bumps on their claws.

It is not currently widely distributed in the state and on-going survey and control work seeks to limit its spread. Currently, they have been positively identified in Farmington Hills, Livonia, Novi, and Shelby Township.

If you believe you have found this species, please immediately report this species to the CISMA or DNR Fisheries Division! Please include clear pictures to help with ID.

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