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.
Ocypode is a genus of ghost crabs found in the sandy shores of tropical and subtropical regions throughout the world. They have a box-like body, thick and elongated eyestalks, and one claw is larger than the other in both males and females. They inhabit deep burrows in the intertidal zone. They are primarily nocturnal, and are generalist scavengers and predators of small animals. The genus contains 21 species.
Reef lobsters, Enoplometopus, are a genus of small lobsters that live on reefs in the Indo-Pacific, Caribbean and warmer parts of the Atlantic Ocean.
Upogebia is a genus of mud shrimp, in the family Upogebiidae, containing the following species:
Callianassidae is a family of ghost shrimp crustaceans belonging to the infraorder Axiidea, within the order Decapoda.
Biffarius filholi is a ghost shrimp of the family Callianassidae, endemic to New Zealand, which grows up to 60 millimetres (2.4 in) long.
Pestarella is a genus of thalassinidean crustacean erected in 2003 from former members of the genus Callianassa. It is distinguished from Callianassa by the rounded, rather than squarish telson, and by the absence of the first two pleopods in males. The genus contains the following species:
Galathea intermedia is a species of squat lobster in the family Galatheidae. It is found in the north-eastern Atlantic Ocean, as far north as Troms, Norway, south to Dakar and the Mediterranean Sea.
Nanogalathea raymondi is a species of squat lobster from the Bay of Bengal. It is the only species in the genus Nanogalathea. It can be distinguished from other squat lobsters by the lack of any teeth along the edge of the rostrum. The specific epithet raymondi commemorates the carcinologist Raymond B. Manning.
Allogalathea elegans is a species of squat lobster that is sometimes kept in marine aquariums. Despite their common name, they are more closely related to hermit crabs than lobsters.
Biffarius is a genus of ghost shrimp in the family Callianassidae, containing species formerly included in the genus Callianassa. Its members are small and generally live in the intertidal zone. In April 2020, a new species was described from the northeastern Brazilian coast. Biffarius was named in honour of Thomas A. Biffar, and includes the following species:
Anomoeomunida is a monotypic squat lobster genus in the family Munididae. The sole a species of is Anomoeomunida caribensis. It occurs in the western Atlantic.
Heteronida is a genus of squat lobsters in the family Munididae. They occur in the western Pacific Ocean.
Plesionida is a genus of squat lobsters in the family Munididae. As of 2017, it contains the following species:
Nematocarcinoidea is a superfamily of shrimp, comprising four families – Eugonatonotidae, Nematocarcinidae, Rhynchocinetidae and Xiphocarididae. They share the presence of strap-like epipods on at least the first three pairs of pereiopods, and a blunt molar process.
Calliapagurops is a genus of mud shrimp containing two species:
Dorphinaxius kermadecensis is a species of mud lobster native to the Norfolk Island, parts of New South Wales, and the Kermadec Islands of New Zealand. It is the only species in the genus Dorphinaxius. It has a depth range of 0–8 metres (0–26 ft).
Acanthaxius is a genus of mud lobster native to the Indo-Pacific oceans. It has a slender rostrum which is longer than the eyestalks, is spinose and has seven spines and has a depth range of 228–438 metres (748–1,437 ft).
Callichirus is a genus of crustaceans belonging to the family Callianassidae. It was circumscribed by William Stimpson in 1866.
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.
