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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 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 ]
Portunus trituberculatus, known as the horse crab, known as the gazami crab or Japanese blue crab, is the most widely fished species of crab in the world, with over 300,000 tonnes being caught annually, 98% of it off the coast of China. [5] Horse crabs are found from HokkaidÅ to South India, throughout Maritime Southeast Asia and south to ...
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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.
Fishermen and scientists were alarmed when billions of crabs vanished from the Bering Sea near Alaska in 2022. ... Snow crabs are a commercially valuable species, worth up to $227 million a year ...
Much of this foreign crab is reportedly caught and imported illegally and has led to a steady decline in the price of crab from $3.55 per pound in 2003 to $3.21 in 2004, $2.74 in 2005 and $2.30 in 2007 for Aleutian golden king crab, and $5.15 per pound in 2003 to $4.70 in 2004 to $4.52 in 2005 and $4.24 in 2007 for Bristol Bay red king crab. [7]
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).