The Murray crayfish, Euastacus armatus, is a species of freshwater crayfish endemic to Australia that belongs to the family Parastacidae. The Murray crayfish has the largest geographic range of any of the Euastacus crayfish in Australia, being found in the Murray and Murrumbidgee Rivers as well as many of their tributaries. Murray crayfish are also known as "Murray River crayfish", "Murray crays", "freshwater crays", "spiny freshwater crays", "spinies" and in the Wagga Wagga region of southern New South Wales they are simply known as "lobsters".
Euastacus is a genus of freshwater crayfish known as "spiny crayfish". They are found in the south-east of the Australian mainland, along with another genus of crayfish, Cherax. Both genera are members of the family Parastacidae, a family of freshwater crayfish restricted to the Southern Hemisphere.
Euastacus bindal is a species of southern crawfish in the family Parastacidae.
Euastacus bispinosus, the Glenelg cray, is a species of southern crawfish in the family Parastacidae.
Euastacus crassus is a species of southern crayfish in the family Parastacidae. It is commonly known as the Alpine spiny crayfish.
Euastacus diversus is a species of southern crawfish in the family Parastacidae.
Euastacus eungella is a species of southern crawfish in the family Parastacidae.
Euastacus fleckeri is a species of southern crawfish in the family Parastacidae.
Euastacus hystricosus is a species of southern crawfish in the family Parastacidae.
Euastacus maidae is a species of Australian crayfish in the family Parastacidae. It is known only from a single catchment in the Gold Coast hinterland in the State of Queensland, Australia, and is listed as critically endangered on the IUCN Red List. The stream is surrounded by Subtropical Rainforest. This species may also occur in adjacent high rainfall catchments.
Euastacus monteithorum is a species of southern crawfish in the family Parastacidae.
Euastacus neodiversus is a species of southern crawfish in the family Parastacidae.
Euastacus robertsi is a species of southern crawfish in the family Parastacidae.
Euastacus setosus is a species of southern crawfish in the family Parastacidae.
Euastacus urospinosus is a species of southern crawfish in the family Parastacidae.
Euastacus yigara is a species of southern crawfish in the family Parastacidae.
Euastacus sulcatus, also known as the Lamington crayfish, is a freshwater crayfish, or "yabby", native to Australia. It is commonly bright blue in colour and roams the forest floor when conditions are damp. Red and white colour variants also exist.
Euastacus spinifer is a species of freshwater crayfish endemic to Australia that belongs to the family Parastacidae.
Euastacus guruhgi is a species of freshwater crayfish found in the Australian state of New South Wales. It has an estimated extent of occurrence of 80 square kilometres (31 sq mi) and an area of occupancy of 7.5 square kilometres (2.9 sq mi) where it occurs fragmentedly. The species has been assessed as a critically endangered species due to a continuing decline in the quality of its habitat due to the invasive exotic species in the area, some of which predate upon this species. Furthermore, there is a continual destruction of its suitable rainforest habitat. E. guruhgi also faces the consequences of global warming; as a restricted range species, it is dependent on cool headwater streams and a slight increase in the temperature of the water could rapidly eradicate the species. There are no specific conservation measures for this species in place but the distribution range of the E. guruhgi falls within the Mount Warning and Wollumbin national parks. In New South Wales, there is a minimum recreational size limit of 90 mm orbital carpace length for any spiny crayfish. E. guruhgi does not attain that size, and is thus, indirectly protected by this restriction.
Euastacus yanga, the variable spiny cray, is a freshwater crayfish endemic to south eastern Australia.
