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In the Anomura (hermit crabs and related animals), the fifth pair of pereiopods is often hidden inside the branchial chamber, where they are used to clean the gills. The cephalothorax is covered by a carapace which protects the internal organs and the gills; the section of the carapace that projects in front of the eyes is called the rostrum .
Blue crab escaping from the net along the Core Banks of North Carolina.. Callinectes sapidus (from the Ancient Greek κάλλος,"beautiful" + nectes, "swimmer", and Latin sapidus, "savory"), the blue crab, Atlantic blue crab, or, regionally, the Maryland blue crab, is a species of crab native to the waters of the western Atlantic Ocean and the Gulf of Mexico, and introduced internationally.
The remaining group, called Pleocyemata, then diverged between the swimming shrimp groupings and the crawling/walking group called Reptantia, consisting of lobsters and crabs. High species diversification can be traced to the Jurassic and Cretaceous periods, which coincides with the rise and spread of modern coral reefs , a key habitat for the ...
The blue line hermit crab shows a sign of remarkable intelligence. These organisms will traditionally engage in unique behaviors before mating. Some such examples include the male rotating the female’s shell or rubbing their chilipeds, or claws, around the opening of the female’s shell.
Chesapeake blue crab: western Atlantic Ocean and the Gulf of Mexico Callinectes similis Williams, 1966: lesser blue crab or dwarf crab: Western Atlantic Ocean, Caribbean Sea and Gulf of Mexico from the United States to Colombia. Callinectes toxotes Ordway, 1863: Eastern Pacific
Callinectes sapidus – blue crab; Callinectes similis; Cancer bellianus; Cancer borealis – Jonah crab; Cancer irroratus – Atlantic rock crab; Cancer pagurus – edible crab; Carcinus maenas – European shore crab; Cardisoma guanhumi – blue land crab; Carpoporus papulosus; Celatopesia concava; Chaceon fenneri – golden crab ...
Callinectes similis, sometimes called the lesser blue crab [1] or dwarf crab, [2] is a West Atlantic species of blue crab. It was described by Austin B. Williams in 1966.
Clibanarius tricolor is a hermit crab that lives in shallow water of the Caribbean Sea and is popular in the home aquarium trade. Its common names include blue-legged hermit crab, tricolor hermit crab, [1] blueleg reef hermit crab, equal handed hermit crab and blueleg hermit crab.