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The pair attached to the first segment of the head are called primary antennae or antennules. This pair is generally uniramous, but is biramous in crabs and lobsters and remipedes . The pair attached to the second segment are called secondary antennae or simply antennae .
The Dyspanopeus texanus are also one of the most abundant and dominant crab species in the coastal lagoons of southwestern Gulf of Mexico, including Términos, Tamiahua, and Madre. The Texas Mud Crabs are also known as euryhaline species, which means that they can adapt to wide ranges of salinity, which is why they have been historically found ...
The blue crab, Callinectes sapidus was chosen as the state crustacean of Maryland in 1989. [17] C. sapidus is a crab found in the waters of the western Atlantic Ocean, the Pacific coast of Central America and the Gulf of Mexico. The blue crab may grow to a carapace width of 230 mm (9.1 in).
The crab can reach a maximum size of 20 millimetres (0.8 in). It has an olive-green-brownish color, sometimes with dark spots on its carapace . It is a common inhabitant of Texas and Florida estuaries , but was later introduced all over the world. [ 3 ]
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The California rock crab fishery is made up of three species - the yellow rock crab (C. anthonyi), the brown rock crab (R. antennarium), and the red rock crab (C. productus). Rock crab landings for 1999 were 790,000 pounds and have averaged 1.2 million pounds per year from 1991-1999.
Emerita talpoida, known generally as the Atlantic mole crab or Atlantic sand crab, is a species of mole crab in the family Hippidae. It is found in the western Atlantic Ocean and Mexico along the shoreline .