The Caridea, commonly known as caridean shrimp or true shrimp, from the Greek word καρίς, καρίδος (karís, karídos, “shrimp”), are an infraorder of shrimp within the order Decapoda. This infraorder contains all species of true shrimp.
Shrimp are swimming crustaceans with long narrow muscular abdomens and long antennae. Unlike crabs and lobsters, shrimp have well-developed pleopods (swimmerets) and slender walking legs; they are more adapted for swimming than walking.
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The Dendrobranchiata consist of prawns, including many species colloquially referred to as "shrimp", such as the "white shrimp", Litopenaeus setiferus. The Pleocyemata include the remaining groups, including "true shrimp". [5]
True shrimp are swimming, decapod crustaceans classified in the infraorder Caridea, characterized by a body that is compressed from side to side, long antennae and legs, thin and semitransparent exoskeleton, lamellar gills, and fan-like tail.
Acanthephyra curtirostris is an all-red shrimp which has a median dorsal ridge on abdominal segment 6 but not on segment 1. It has a blunt rostrum as in the photo above. The second somite of the abdomen is dorsally carinate.
The Caridea, commonly known as caridean shrimp or true shrimp, are an infraorder of shrimp within the order Decapoda. This infraorder contains all species of true shrimp. They are found widely around the world in both fresh and salt water.