Arenaeus

	Arenaeus ''Arenaeus'' is a genus of swimming crabs in the family Portunidae. There are at least two described species in ''Arenaeus''. Species These two species belong to the genus ''Arenaeus'': * '' Arenaeus cribrarius'' (Lamarck, 1818) (speckled swimming crab) * '' Arenaeus mexicanus'' (Gerstaecker, 1856) References Further reading * External links * Decapods Articles created by Qbugbot {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Arenaeus Cribrarius ''Arenaeus cribrarius'', the speckled swimming crab, is a species of swimming crab in the family Portunidae. Habitat The crabs can be found from Massachusetts, U.S. to areas in Argentina.Alexandre Ribeiro da Silva; Barioto, João Gabriel; Grabowski, Raphael Cezar; Antonio Leão Castilho.Biologia; Heidelberg Vol. 72, Iss. 3, (2017): 325-332. They are common in shallow water on sand in ocean beaches, but can be found in depths up to deep. They are typically found in temperate or tropical waters between eleven and twenty-nine degrees Celsius with a salinity between twenty-eight and thirty-five PSU. ''Arenaeus cribrarius'' often bury themselves entirely in sand, but leave a gap for water to pass to their gills. The crabs maintain the gap by clearing the sand with their claws and hairs around their mouth area. ''Arenaeus cribrarius'' is a nocturnal and solitary organism, which only interacts with other crabs of its species when it wants to breed. Feeding The Speckled swimm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Arenaeus Mexicanus ''Arenaeus'' is a genus of swimming crabs in the family Portunidae. There are at least two described species in ''Arenaeus''. Species These two species belong to the genus ''Arenaeus'': * ''Arenaeus cribrarius ''Arenaeus cribrarius'', the speckled swimming crab, is a species of swimming crab in the family Portunidae. Habitat The crabs can be found from Massachusetts, U.S. to areas in Argentina.Alexandre Ribeiro da Silva; Barioto, João Gabriel; ...'' (Lamarck, 1818) (speckled swimming crab) * '' Arenaeus mexicanus'' (Gerstaecker, 1856) References Further reading * External links * Decapods Articles created by Qbugbot {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Swimming Crab Portunidae is a family of crabs which contains the swimming crabs. Description Portunid crabs are characterised by the flattening of the fifth pair of legs into broad paddles, which are used for swimming. This ability, together with their strong, sharp claws, allows many species to be fast and aggressive predators. Examples Its members include many well-known shoreline crabs, such as the European shore crab (''Carcinus maenas''), 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 serrata'') and ''Scylla paramamosain''. Taxonomy The circumscription of the family varies, with some authors treating "Carcinidae", "Catoptridae" and "Macropipidae" as separate families, and others considering them subfamilies of a wider Portunidae. Swimming crabs reach their greatest species diversity in the Pacific and Indian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Portunidae Portunidae is a family of crabs which contains the swimming crabs. Description Portunid crabs are characterised by the flattening of the fifth pair of legs into broad paddles, which are used for swimming. This ability, together with their strong, sharp claws, allows many species to be fast and aggressive predators. Examples Its members include many well-known shoreline crabs, such as the European shore crab (''Carcinus maenas''), 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 serrata'') and ''Scylla paramamosain''. Taxonomy The circumscription of the family varies, with some authors treating "Carcinidae", "Catoptridae" and "Macropipidae" as separate families, and others considering them subfamilies of a wider Portunidae. Swimming crabs reach their greatest species diversity in the Pacific and Indian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Decapods The Decapoda or decapods (literally "ten-footed") are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crabs, lobsters, crayfish, shrimp and prawns. Most decapods are scavengers. The order is estimated to contain nearly 15,000 species in around 2,700 genera, with around 3,300 fossil species. Nearly half of these species are crabs, with the shrimp (about 3,000 species) and Anomura including hermit crabs, porcelain crabs, squat lobsters (about 2500 species) making up the bulk of the remainder. The earliest fossil decapod is the Devonian ''Palaeopalaemon''. Anatomy Decapods can have as many as 38 appendages, arranged in one pair per body segment. As the name Decapoda (from the Greek , ', "ten", and , '' -pod'', "foot") implies, ten of these appendages are considered legs. They are the pereiopods, found on the last five thoracic segments. In many decapods, one pair of these "legs" has enlarged pincers, called chelae, with the legs bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]