The Caridea, commonly known as caridean shrimp or true shrimp, from the Greek word καρίς, καρίδος, 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. Many other animals with similar names – such as the mud shrimp of Axiidea and the boxer shrimp of Stenopodidea – are not true shrimp, but many have evolved features similar to true shrimp.
The Decapoda or decapods 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. Nearly half of these species are crabs, with the shrimp and Anomura including hermit crabs, porcelain crabs, squat lobsters making up the bulk of the remainder. The earliest fossils of the group date to the Devonian.
Hippolytidae is a family of cleaner shrimp, also known as broken-back shrimp or anemone shrimp. The term "broken-back shrimp" also applies to the genus Hippolyte in particular and "cleaner shrimp" is sometimes applied exclusively to Lysmata amboinensis.
Physetocaris is a monotypic genus of caridean shrimp, containing a single species, Physetocaris microphthalma.
Synalpheus is a genus of snapping shrimp of the family Alpheidae, presently containing more than 160 species; new ones are described on a regular basis, and the exact number even of described species is disputed.
Acetes is a genus of small shrimp that resemble krill, which is native to the western and central Indo-Pacific, the Atlantic coast of the Americas, Pacific coast of South America and inland waters of South America. Although most are from marine or estuarine habitats, the South American A. paraguayensis is a fresh water species. Several of its species are important for the production of shrimp paste in Southeast Asia, including A. japonicus, which is the world's most heavily fished species of wild shrimp or prawn in terms of total tonnage and represent the majority of non-human animals killed for food in terms of number of individuals.
Palaemon is a genus of caridean shrimp in the family Palaemonidae.
Lysmata is a genus of shrimp in the infraorder Caridea, the caridean shrimp. The genus belongs to the family Lysmatidae. Lysmata are popular ornamental shrimp in the marine aquarium trade for their bright color patterns, interesting behaviors, and ability to control certain aquarium pests such as sea anemones of the genus Aiptasia. They are known to command high prices on the pet market.
Johngarthia weileri is a species of land crab in the genus Johngarthia from the eastern Atlantic Ocean.
Pandalus is a genus of shrimp in the family Pandalidae. Members of the genus are medium-sized and live on or near the seabed. Some species are the subject of commercial fisheries and are caught by trawling. One species, Pandalus montagui, lives in association with the reef-building polychaete worm, Sabellaria spinulosa.
Spongicolidae is a family of glass sponge shrimp in the order Decapoda. There are about 8 genera and more than 40 described species in Spongicolidae. Apart from the shallows-dwelling genus Microprosthema, the family consists of glass sponge infauna, living within the body cavity of the sponge, presumably for life with a few other sponge shrimp. The sponge infaunal species most often inhabit Euplectella sponges, but can be found in Hyalonema sieboldii, Dactylocalyx pumiceus, Regradella phoenix, and R. okinosena.
Crangon is a genus of shrimp.
The Panopeidae are a family containing 26 genera of morphologically similar crabs, often known as "mud crabs". Their centers of diversity are the Atlantic Ocean and eastern Pacific Ocean.
Trachysalambria curvirostris is a species of prawn that lives in shallow waters of the Indo-West Pacific. It is one of the most important species targeted by prawn fishery, with annual harvests of more than 300,000 t, mostly landed in China.
Trachysalambria is a genus of prawns. It was erected in 1934 by Martin Burkenroad, as a subgenus of Trachypenaeus, with T. curvirostris as its type species. That subgenus was elevated to the rank of genus in 1997 by Isabel Pérez Farfante and Brian Kensley. It contains the following species:
Ogyrides, also known as long eyed shrimps, is a genus of decapod crustaceans consisting of 13 species. It is the only genus in the monotypic family Ogyrididae.
Thoridae, also known as broken-back shrimp or anemone shrimp, is a family of cleaner shrimp.
Periclimenes, commonly known as glass shrimp or cleaner shrimp, is a commensal and often symbiotic genus of semi-transparent shrimp within the family Palaemonidae. Species of this large genus feature a wide variety of coloration and patterns, widespread distribution throughout much of the world's tropical oceans, and are often sought out for aquarium trade.
Callichirus major sensu lato is a monophyletic species complex of ghost shrimp in the infraorder Axiidea, found in flat sandy beaches across the Pan-American coastline.
Atyoida is a genus of freshwater shrimp in the family Atyidae. There are five species in the genus, each endemic to a different Pacific island group. The type species, Atyoida bisulcata, is endemic to Hawaiʻi and described by John Witt Randall in 1840.
