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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] |
Charybdis (crab)
''Charybdis'' is a genus of swimming crabs in the family Portunidae; " Charybdis" is Greek for whirlpool. Species The genus ''Charybdis'' contains the following species: ;Subgenus'' Charybdis'' (''Charybdis'') De Haan, 1833 *'' Charybdis acuta'' ( A. Milne-Edwards, 1869) *'' Charybdis acutidens'' Türkay, 1986 *'' Charybdis affinis'' Dana, 1852 *'' Charybdis amboinensis'' Leene, 1938 *'' Charybdis anisodon'' (De Haan, 1850) *''Charybdis annulata'' ( Fabricius, 1798) *'' Charybdis beauforti'' Leene & Buitendijk, 1949 *'' Charybdis brevispinosa'' Leene, 1937 *''Charybdis callianassa'' ( Herbst, 1789) *''Charybdis cookei'' Rathbun, 1923 *''Charybdis crosnieri'' Spiridonov & Türkay, 2001 *''Charybdis curtilobus'' Stephenson & Rees, 1967 *''Charybdis demani'' Leene, 1937 *'' Charybdis feriata'' (Linnaeus, 1758) *''Charybdis gordonae'' Shen, 1934 *''Charybdis granulata'' (De Haan, 1833) *''Charybdis hawaiensis'' Edmondson, 1954 *'' Charybdis hellerii'' (A. Milne-Edwards, 1867) *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callinectes Sapidus
''Callinectes sapidus'' (from the Ancient Greek ,"beautiful" + , "swimmer", and Latin , "savory"), the blue crab, Atlantic blue crab, or regionally as the Chesapeake blue crab, is a species of crab native to the waters of the western Atlantic Ocean and the Gulf of Mexico, and introduced internationally. ''C. sapidus'' is of considerable culinary and economic importance in the United States, particularly in Louisiana, the Carolinas, the Chesapeake Bay, Delaware, and New Jersey. It is the Maryland state crustacean and the state's largest commercial fishery. Due to overfishing and environmental pressures some of the fisheries have seen declining yields, especially in the Chesapeake Bay fishery. Unlike other fisheries affected by climate change, blue crab is expected to do well; warming causes better breeding conditions, more survivable winters, and a greater range of habitable areas in the Atlantic coast. Whether this will have negative effects on the surrounding ecosystems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crab
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the world's oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. They first appeared during the Jurassic Period. Description Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a pair of chelae (claws). Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to . Several other groups of crustaceans with similar appearances – such as king crabs and porcelain crabs – are not true crabs, but have evolved features similar to true crabs through a process known as carcinisation. Environment Crabs are found in all of the world's oceans, as well as in fresh w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scylla Paramamosain
''Scylla paramamosain'' is a mud crab (other), mud crab commonly consumed in Southeast Asia. Distribution ''Scylla paramamosain'' is found along the coastlines of the South China Sea down to the Java Sea. It is now produced by aquaculture farms in southern Vietnam. Taxonomy ''Scylla paramamosain'' was described by Eulogio P. Estampador in 1949, as a subspecies of ''Scylla serrata''. It is now known that the crabs previously referred to as ''S. serrata'' in China were mostly ''S. paramamosain''. References {{Taxonbar, from=Q387364 Arthropods of Vietnam Edible crustaceans Commercial crustaceans Portunoidea Crustaceans described in 1949 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velvet Crab
The velvet crab, or alternately ''velvet swimming crab'', ''devil crab'', “fighter crab”, or ''lady crab,'' ''Necora puber'', is a species of crab from the North-East Atlantic and the Mediterranean. It is the largest of the swimming crab family (Portunidae) found in British coastal waters. The Onychophora is split into living families, the Peripatidae and Peripatopsidae. The Peripatidae family shows populations in West Africa, Southeast Asia, and Neotropics with the only remains of fossils representing the members of the crown-group Onychophora. The Peripatopsidae family shows distribution in parts of Chile, South Africa, and ''Australia''. It has a carapace width of up to , and is the only species in the genus ''Necora''. Its body is coated with short hairs, giving the animal a velvety texture, hence the common name. It is one of the major crab species for United Kingdom fisheries, in spite of its relatively small size. The velvet crab lives from southern Norway to Western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scylla (crustacean)
''Scylla'' is a genus of swimming crabs, comprising four species, of which '' S. serrata'' is the most widespread. They are found across the Indo-West Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the .... The four species are: References Portunoidea Decapod genera Taxa named by Wilhem de Haan {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scylla Serrata
''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, Australasia, and Asia. In their most common forms, their shell colours vary from a deep, mottled green to very dark brown. Distribution The natural range of ''S. serrata'' is in the Indo-Pacific. It is found from South Africa, around the coast of the Indian Ocean, where it is especially abundant in Sri Lanka, to the Southeast Asian Archipelago, as well as from southern Japan to south-eastern Australia, northern New Zealand, And as far east as Fiji and Samoa. The species has also been introduced to Hawaii and Florida. In Hawaii, mud crabs are colloquially known as Samoan crabs, as they were originally imported from American Samoa. As these crabs are known for their robust size and dense meat content, they have been greatly sought after over the years. As a result of o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcinus Maenas
''Carcinus maenas'' is a common littoral crab. It is known by different names around the world. In the British Isles, it is generally referred to as the shore crab, or green shore crab. In North America and South Africa, it bears the name european green crab. ''C. maenas'' is a widespread invasive species, listed among the 100 "world's worst alien invasive species". It is native to the north-east Atlantic Ocean and Baltic Sea, but has colonised similar habitats in Australia, South Africa, South America and both Atlantic and Pacific coasts of North America. It grows to a carapace width of , and feeds on a variety of mollusks, worms, and small crustaceans, potentially affecting a number of fisheries. Its successful dispersal has occurred by a variety of mechanisms, such as on ships' hulls, sea planes, packing materials, and bivalves moved for aquaculture. Description ''C. maenas'' has a carapace up to long and wide, but can be larger outside its native ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcinus
''Carcinus'' ( '' Karkinos'') is a genus of crabs, which includes ''Carcinus maenas'', an important invasive species, and '' C. aestuarii'', a species endemic to the Mediterranean Sea. ''Carcinus maenas'' ''C. maenas'' is among the 100 "world's worst alien invasive species". It is native to the northeast Atlantic Ocean and Baltic Sea, but has colonised similar habitats in Australia, South Africa, South America, and both Atlantic and Pacific Coasts of North America. It grows to a carapace width of , and feeds on a variety of molluscs, worms, and small crustaceans, potentially impacting a number of fisheries. Its successful dispersion has occurred via a variety of mechanisms, such as on ships' hulls, packing materials, bivalves moved for aquaculture, and rafting. ''C. maenas'' is known by different names around the world. In the British Isles, it is generally referred to simply as the shore crab. In North America and South Africa, it bears the name green crab or European green ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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