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Every species of freshwater crab described so far has been assessed by the International Union for Conservation of Nature; [6] of the species for which data are available, 32% are threatened with extinction. [5] For instance, all but one of Sri Lanka's 50 freshwater crab species are endemic to that country, and more than half are critically ...
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]
Crabs are members of infraorder Brachyura. They are crustaceans with five pairs of legs, the first pair modified to form a pair of pincers, a flattish shell, and a short, broad abdomen folded under its thorax.
The Levantine freshwater crab is a semi-terrestrial species that is very active both on land and in the water. They are not social and they exhibit aggressive and territorial behavior, especially during breeding season. [3] In this species, medium-sized individuals are nocturnal, whereas the larger ones are diurnal. [1]
The assessment found that crabs, crayfish and shrimps face the highest extinction risk of the groups studied, with 30% under threat, followed by 26% of freshwater fish species, and 16% of ...
The blue crab, Callinectes sapidus was chosen as the state crustacean of Maryland in 1989. [17] C. sapidus is a crab found in the waters of the western Atlantic Ocean, the Pacific coast of Central America and the Gulf of Mexico. The blue crab may grow to a carapace width of 230 mm (9.1 in).
Potamonautes sidneyi is a species of freshwater crab in the family Potamonautidae. The common name is the Natal river crab or Sidney's river crab , [ 1 ] although they may also be referred to as "river crabs", "fresh water crabs" or "land crabs".
Arcopotamonautes platynotus is a species of freshwater crab which is endemic to Lake Tanganyika, where it is the only freshwater crab outside the genus Platythelphusa. [2] Although primarily aquatic, A. platynotus is sometimes seen out of water, and can survive for many hours without water. [1]