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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]
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).
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]
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.
Florida stone crabs prefer to feed on oysters and other small mollusks, polychaete worms, and other crustaceans. They will also occasionally eat seagrass and carrion. Predators that feed on stone crabs include horse conch, grouper, sea turtles, cobia, and octopuses. [4]
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".
Small, colorful, and a lover of habitats with sandy substrates, Red-clawed Crabs are some of the best aquarium pets that aren’t fish. Also known as Mangrove Crabs or Red Crabs, these clawed ...
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 .