The greatest diversity of crayfish species is found in southeastern North America, with over 330 species in nine genera, all in the family Cambaridae. A further genus of astacid crayfish is found in the Pacific Northwest and the headwaters of some rivers east of the Continental Divide. Many crayfish are also found in lowland areas where the water is abundant in calcium, and oxygen rises from underground springs. In 1983, Louisiana designated the crayfish, or crawfish as they are commonly called, as its official state crustacean. Louisiana produces 100 million pounds of crawfish per year with the red swamp and white river crawfish being the main species harvested. Crawfish are a part of Cajun culture dating back hundreds of years. A variety of cottage industries have developed as a result of commercialized crawfish iconology. Their products include crawfish attached to wooden plaques, T-shirts with crawfish logos, and crawfish pendants, earrings and necklaces made of gold or silver. Australia has over 100 species in a dozen genera. Australia is home to the world's three largest freshwater crayfish – the Tasmanian giant freshwater crayfish "Astacopsis gouldi", which can achieve a mass of over and is found in rivers of northern Tasmania, the Murray crayfish "Euastacus armatus", which can reach , (although there have been reports of animals up to ) and is found in much of the southern Murray-Darling basin and the marron from Western Australia (now believed to be two species, "Cherax tenuimanus" and "C. cainii") which may reach a weight of . Many of the better-known Australian crayfish are of the genus "Cherax", and include the common yabby ("Cherax destructor"), western yabby ("Cherax preissii") and red-claw crayfish ("Cherax quadricarinatus"). The marron species "C. tenuimanus" is critically endangered, while other large Australasian crayfish are threatened or endangered. In New Zealand, two species of "Paranephrops" are endemic, and are known by the Māori name "". In Australia, New Zealand and South Africa, the term "crayfish" or "cray" generally refers to a saltwater spiny lobster, of the genus "Jasus" that is indigenous to much of southern Oceania, while the freshwater species are usually called "yabbies" or "", from the indigenous Australian and Māori names for the animal respectively, or by other names specific to each species.