''Euastacus crassus'' is a species of southern

crayfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mu ...

in the family

Parastacidae The Parastacidae are the family of freshwater crayfish found in the Southern Hemisphere. The family is a classic Gondwana-distributed taxon, with extant members in South America, Madagascar, Australia, New Zealand, and New Guinea, and extinct ta ...

. It is commonly known as the Alpine spiny crayfish. The IUCN conservation status of ''Euastacus crassus'' is "EN", endangered. The species faces a high risk of extinction in the near future. The IUCN status was reviewed in 2010.

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