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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]
Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tail" in Greek), which typically have a very short projecting tail-like abdomen, usually hidden entirely under the thorax. [ a ] They live in all the world's oceans, in freshwater , and on land .
Portunidae is a family of crabs which contains the swimming crabs. Its members include many well-known shoreline crabs, such as the blue crab ( Callinectes sapidus ) and velvet crab ( Necora puber ). Two genera in the family are contrastingly named Scylla and Charybdis ; the former contains the economically important species black crab ( Scylla ...
Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps, and various other types of brackish or salt-water wetlands. Whilst fiddler crabs are currently split into two subfamilies of Gelasiminae and Ucinae, there is still phylogenetic and taxonomical debate as to whether the movement from the overall genus of ...
Capture (blue) and aquaculture (green) production of Indo-Pacific swamp crab (Scylla serrata) in thousand tonnes from 1950 to 2022, as reported by the FAO [1]Scylla serrata (often called mud crab or mangrove crab, although both terms are highly ambiguous, and black crab) is an ecologically important species of crab found in the estuaries and mangroves of Africa, Australia, and Asia.
Mangrove crabs are predated on by wading birds, fish, sharks, [8] monkeys, hawks, and raccoons. [7] The larvae of mangrove crabs is a major source of food for juvenile fish in waterways near the crabs. [24] Adult mangrove crabs are food for the crab plover among other protected species. [17] To protect themselves the crabs can climb trees. [25]
Consequently, they can be threatening, especially to crabs, shrimps, and smaller fish, and are known for hopping out of tanks, so make sure yours is covered. Scientific name oxycirrhites typus ...
Despite the possibly misleading common name, European green crabs are not only green. The underside of their carapace can range from green to yellow to orange to red. The best way to identify them is through other characteristics, such as the five spines on either side of their eyes, with three in between them. Carcinus maenas is a common ...