Cherax tenuimanus
Encyclopedia
Cherax tenuimanus, known as the hairy marron or Margaret River marron, is one of two species of crayfish
Crayfish
Crayfish, crawfish, or crawdads – members of the superfamilies Astacoidea and Parastacoidea – are freshwater crustaceans resembling small lobsters, to which they are related...

 in Southwestern Australia known as marron
Marron
Marron is a name given to two closely related species of crayfish in Western Australia. Formerly considered a single species, it is now thought to comprise two species, the critically endangered Cherax tenuimanus, and the species which is outcompeting it, Cherax cainii.Marron make excellent eating,...

. It occupies a narrow range within the southwestern biogeographical region of Margaret River
Margaret River, Western Australia
Margaret River is a town in the South West of Western Australia, located in the valley of the eponymous Margaret River, south of Perth, the state capital. Its Local Government Area is the Shire of Augusta-Margaret River....

. It is currently listed as critically endangered
Critically endangered
Version 2010.3 of the IUCN Red List of Threatened Species identified 3744 Critically Endangered species, subspecies and varieties, stocks and subpopulations.Critically Endangered by kingdom:*1993 Animalia*2 Fungi*1745 Plantae*4 Protista-References:...

 on the IUCN Red List
IUCN Red List
The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...

, because of the threat from the wider ranged smooth marron, Cherax cainii, which was introduced to its habitat.
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