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More than 1,300 described species of freshwater crabs are known, out of a total of 6,700 species of crabs across all environments. [1] The total number of species of freshwater crabs, including undescribed species, is thought to be up to 65% higher, potentially up to 2,155 species, although most of the additional species are currently unknown to science. [1]
Potamon fluviatile is a freshwater crab found in or near wooded streams, rivers and lakes in Southern Europe. It is an omnivore with broad ecological tolerances, and adults typically reach 50 mm (2 in) in size during their 10–12 year lifespan. They inhabit burrows and are aggressive, apparently outcompeting native crayfish.
Sri Lanka's freshwater crab fauna is extremely important to the island, due to its endemism. All recorded 51 species, along with five genera, are totally endemic to Sri Lanka. [ 1 ] [ 2 ] 98% of those crabs are IUCN categorized as threatened, endangered or critically endangered animals due to habitat declining, capturing for food, illegal ...
Austrothelphusa transversa (von Martens, 1868), also known as the inland crab, freshwater crab, or tropical freshwater crab [3] is a species of freshwater crab endemic to Australia. [1] A. transversa is the most widely-dispersed species of its genus, as it has adaptations giving it a high tolerance to drought and arid conditions. [4]
Arachnothelphusa rhadamanthysi Cave crab, Borneo Parathelphusinae is a subfamily of freshwater crabs, which was formerly placed in the family Parathelphusidae; they are mainly found in South and Southeast Asia, but also found elsewhere in Asia and in Australia.
Potamon is a genus of freshwater or semiterrestrial crabs mainly found from Southern Europe through the Middle East, and as far east as north-western India. [2] The only exception is the North African P. algeriense, which also is the only potamid of mainland Africa.
Crabs are found in all of the world's oceans, as well as in fresh water and on land, particularly in tropical regions. About 850 species are freshwater crabs . [ 11 ]
A young Levantine freshwater crab in captivity at the NHMC in Greece. Levantine freshwater crabs have an average leg span of 10 to 15 centimeters (4 to 6 inches) and the males are typically larger than the females. Their carapace is slightly arched, smooth, and concave; and has a size 5 to 7 cm (2 to 3 in).