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Decapod anatomy. The decapod (crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon (abdomen). [1][2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail:
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, Australia, and Asia. In their most common forms, their shell colours vary from a deep, mottled green to very dark brown.
Lithodes maja, the Norway king crab or northern stone crab, [3] is a species of king crab which occurs in colder North Atlantic waters off Europe and North America. It is found along the entire coast of Norway, including Svalbard, ranging south into the North Sea and Kattegat, the northern half of the British Isles (with a few records off southwest England), and around the Faroe Islands ...
Dromia personata, also known as the sponge crab or sleepy crab, is a species of crab found in the North Sea, the Mediterranean Sea, and connecting parts of the northeastern Atlantic Ocean. [4] Like most other epibenthic crustaceans, the biomass of this species is especially dense in the Mediterranean continental shelf . [ 5 ]
Hepatus epheliticus, known by various names, including the calico crab (not to be confused with Ovalipes ocellatus) and Dolly Varden crab, is a species of crab. It lives in shallow water in the western Atlantic Ocean from the Chesapeake Bay to the Dominican Republic. It has a 3-inch (76 mm)–wide carapace adorned with large red spots with ...
Dromioidea. Family: Dromiidae. De Haan, 1833[1] Dromiidae is a family of crabs, [2] often referred to as sponge crabs. They are small or medium-sized crabs which get their name from the ability to shape a living sponge into a portable shelter for themselves. [3] A sponge crab cuts out a fragment from a sponge and trims it to its own shape using ...
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Ovalipes ocellatus, known as the lady crab, is a species of crab from eastern North America. [1] Other names for it include the leopard crab or Atlantic leopard crab due to the leopard-like rosette patterns on its shell, the calico crab (not to be confused with Hepatus epheliticus ), or ocellated crab . [ 3 ]