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Crayfish usually have limited home range and so they rest, digest, and eliminate their waste, most commonly in the same location each day. Feeding exposes the crayfish to risk of predation, and so feeding behaviour is often rapid and synchronised with feeding processes that reduce such risks — eat, hide, process and eliminate.
The common yabby (Cherax destructor) is an Australian freshwater crustacean in the Parastacidae family.It is listed as a vulnerable species [1] of crayfish by the International Union for Conservation of Nature (IUCN), though the wild yabby populations remain strong, and have expanded into new habitats created by reservoirs and farm dams.
The Everglades crayfish [2] (Procambarus alleni), sometimes called the Florida crayfish, the blue crayfish, the electric blue crayfish, or the sapphire crayfish, is a species of freshwater crayfish endemic to Florida in the United States.
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.
The signal crayfish (Pacifastacus leniusculus) is a species of crayfish indigenous to North America. Introduced to Europe in the 1960s to supplement the North European Astacus astacus fisheries, which were being damaged by crayfish plague , it was subsequently discovered that the signal was itself a carrier of that disease.
The genus Cambarus is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus Procambarus. [2] Though Cambarus are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification.
Procambarus fallax (also known as deceitful crayfish [1] or slough crayfish [2] [4]) is a species of crayfish in the genus Procambarus. It lives in tributaries of the Satilla River in Georgia and Florida. [1] [2] It is the closest relative to the parthenogenetic marbled crayfish, Procambarus virginalis. [5] [6]
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]