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The Tasmanian giant freshwater crayfish (Astacopsis gouldi), also called Tasmanian giant freshwater lobster, is the largest freshwater invertebrate and the largest freshwater crayfish species in the world. The species is only found in the rivers below 400 metres (1,300 ft) above sea level in northern Tasmania, an island-state of Australia.
Faxonius shoupi, the Nashville crayfish, is a freshwater crustacean native to the Mill Creek Basin in Nashville, Tennessee. [2] Prior to August 2017, the species was called Orconectes shoupi . [ 4 ] Faxonius shoupi is protected under the Endangered Species Act (ESA) as an endangered species.
This is why most researchers have not attempted to understand the diet of freshwater crayfish. The most complex study which matched the structure and function of the whole digestive tract with ingested material was performed in the 1990s by Brett O'Brien on marron , [ 12 ] the least aggressive of the larger freshwater crayfish with aquaculture ...
For the Hell Creek Cave crayfish to be down-listed from endangered to threatened, three viable populations of the species must be discovered and protected. [5] To potentially be delisted from the ESA and considered recovered, a total of ten populations must be discovered, and a total of five viable populations must be fully protected.
The Big Sandy crayfish is listed as threatened wherever found under the ESA. [2] It was originally reviewed for listing in 1991 when it was known as C. veteranus. The crayfish was proposed to be listed as endangered with C. veteranus on 7 April 2015, which is when the two new species were distinguished in the ESA (ECOS 12 month finding). [6]
Cambarus obeyensis, the Obey crayfish, is a species of crayfish in the family Cambaridae. It is found in North America. [2] [3] [1] The IUCN conservation status of Cambarus obeyensis is "CR", critically endangered. The species faces an extremely high risk of extinction in the immediate future. The population is decreasing.
Cambarus aculabrum is a rare species of cave-dwelling crayfish known by the common name Benton county cave crayfish. [4] [5] It is native to Arkansas in the United States, where it is known from only four locations. [5] It is a federally listed endangered species of the United States. [2] [3]
Pacifastacus fortis (known as the Shasta crayfish or placid crayfish) is an endangered crayfish species endemic to Shasta County, California, where it is found and first described in 1914, only in isolated spots along the Pit River and Fall River Mills. [4] It is estimated that there are a total of roughly 4000 of the species still alive today. [5]