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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 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 .
Crab Orchard National Wildlife Refuge is a 43,890 acre (180 km 2) National Wildlife Refuge primarily in southwestern Williamson County, but with small extensions into adjacent eastern Jackson and northeastern Union counties of southern Illinois, in the United States. Its land and water contain a wide diversity of flora and fauna.
More than 1,300 described species of freshwater crabs are known, out of a total of 6,700 species of crabs across all environments. [1] The total number of species of freshwater crabs, including undescribed species, is thought to be up to 65% higher, potentially up to 2,155 species, although most of the additional species are currently unknown to science. [1]
Leading scientists also have denounced the commission’s computer model, which recommends harvesting 175,000 female horseshoe crabs and 500,000 male horseshoe crabs for bait annually.
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The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females claws are both the same size. [ 3 ]
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