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Cutaway diagram of a barnacle, with antennae highlighted by arrow. Crustaceans bear two pairs of antennae. The pair attached to the first segment of the head are called primary antennae or antennules.
' ten-footed ') are an order of crustaceans within the class Malacostraca, and includes crabs, lobsters, crayfish, shrimp, and prawns. Most decapods are scavengers. The order is estimated to contain nearly 15,000 extant species in around 2,700 genera, with around 3,300 fossil species. [1]
Faxonius virilis is a species of crayfish known as the virile crayfish, northern crayfish, eastern crayfish, and lesser known as the lake crayfish or common crawfish. Faxonius virilis was reclassified in August 2017, and the genus was changed from Orconectes to Faxonius . [ 4 ]
The anterior portion of the crayfish is the cephalothorax region. The region rostral to the cephalic groove, which separates the head and thorax region, is characterized by the presence of eyes, antennae and claws while the region caudal contains four pairs of walking legs. This is the crayfish's primary mode of locomotion.
Faxonius shoupi, the Nashville crayfish, is a freshwater crustacean native to the Mill Creek Basin in Nashville, Tennessee. [2] Prior to August 2017, the species was called Orconectes shoupi . [ 4 ] Faxonius shoupi is protected under the Endangered Species Act (ESA) as an endangered species.
When using live crayfish as bait, anglers prefer to hook them between the eyes, piercing through their hard, pointed beak which causes them no harm; therefore, they remain more active. [60] When using crayfish as bait, it is important to fish in the same environment where they were caught.
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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 (). [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing.