Michigan: Marbled Crayfish Now A Prohibited Invasive Species
Department of Natural Resources Director Dan Eichinger approved the addition of marbled crayfish (Procambarus virginalis) to Michigan’s list of prohibited species at yesterday’s meeting of the Michigan Natural Resources Commission. Invasive Species Order Amendment No. 1 of 2020 was presented to the NRC at its April 16 meeting.

| Marbled crayfish, also known as marmorkrebs and virgin crayfish, are increasing in popularity in the aquarium trade due to their unique ability to reproduce by cloning. All known specimens are genetically identical females that can produce up to 700 eggs per reproductive cycle without the need for fertilization. Adding marbled crayfish to the state’s list of prohibited invasive species aligns Michigan with the Conference of Great Lakes and St. Lawrence Governors and Premiers’ list of “least wanted” aquatic invasive species, those that pose a serious threat to the environment and economy in the Great Lakes-St. Lawrence River region. |
What is prohibited status?
Species that are prohibited in Michigan cannot be possessed, introduced, imported, sold or offered for sale as a live organism, except under certain circumstances. Michigan’s Natural Resources Environmental Protection Act (Part 413 of Act 451) established the list of prohibited and restricted species, which can be amended by invasive species orders from the DNR or the Michigan Department of Agriculture and Rural Development. The term “prohibited” is used for species that are not widely distributed in the state. Read more















