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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.
Euastacus sulcatus, also known as the Lamington crayfish, is a freshwater crayfish, or "yabby", native to Australia. It is commonly bright blue in colour although also existing in a red and white, rusty red, brown, green, orange and completely white variations are found all around its known region. [ 2 ]
Cherax albidus, commonly known as the white yabby or commercial yabby, is an Australian freshwater crayfish in the Parastacidae family, found primarily in Western Australian agricultural dams, creeks and other small bodies of water. It receives the name of the white yabby to distinguish it from Cherax destructor, the common or blue yabby. [1]
Cherax, commonly known as yabby/yabbies in Australia, is the most widespread genus of fully aquatic crayfish in the Southern Hemisphere. Various species of cherax may be found in both still and flowing bodies of freshwater across most of Australia and New Guinea. Together with Euastacus, it is also the largest crayfish genus in the Southern ...
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.
C. quadricarinatus is often kept in aquariums worldwide, and is the only species of crayfish that can be kept in indoor aquaria for ornamental use in the UK (except Scotland) without a licence. [7] [8] It is farmed commercially in Queensland and the Northern Territory, and is harvested at between 35–130 grams (1.2–4.6 oz). [6]
Named the 'orange fingered' yabby due to the orange tipping on the end of their chelae (pincers). These yabbies dwell in dug burrows alongside small creeks or ephemeral waterways and can survive dry conditions for several years by lying dormant in burrows sunk deep into the muddy creek beds, coming out into open water only during heavy rainful.
Euastacus crayfish are distinguished from the smooth-shelled Cherax species by the short robust spikes on their claws and carapace, and frequently, their larger size. Many Euastacus species grow to a relatively large size, with the Murray River crayfish ( Euastacus armatus ) being the second largest freshwater crayfish species in the world.