Types of Crustaceans

Amphipod, any member of the invertebrate order Amphipoda (class Crustacea) inhabiting all parts of the sea, lakes, rivers, sand beaches, caves, and moist (warm) habitats on many tropical islands. Marine amphipods have been found at depths of more than 9,100 m (30,000 feet).

Barnacle: Barnacle, any of more than 1,000 predominantly marine crustaceans of the subclass Cirripedia highly modified for sedentary life. There are about 850 free-living species (all marine) and about 260 species that are internal parasites of crabs and other crustaceans. A brief treatment of cirripedes

Branchiopods are free-living forms, the most primitive members of the arthropod subphylum Crustacea. They have compound eyes and usually a protective plate, or carapace. There are many body segments and four or more pairs of trunk limbs that are usually lobed, broad, and fringed on the inner side.

Global wild capture, 1950–2010, in tonnes, of caridean shrimp The most significant commercial species among the carideans is Pandalus borealis, followed by Crangon crangon. The wild capture production of P. borealis is about ten times that of C. crangon.

Crustaceans and Humans. Crustaceans are some of the most important marine life to humans - crabs, lobsters and shrimp are widely fished and consumed around the world. They may also be used in other ways - crustaceans like land hermit crabs may also be used as pets, and marine crustaceans may be used in aquariums.

Copepods are sometimes used as biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a nauplius form, with a head and a tail but no true thorax or abdomen.

Although most crustaceans are small, their morphology varies greatly and includes both the largest arthropod in the world – the Japanese spider crab with a leg span of 3.7 metres (12 ft) – and the smallest, the 1-micrometre-long (0.00004 in) Stygotantulus stocki.

The Decapoda or decapods (literally "ten-footed") are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns, and shrimp. Most decapods are scavengers.

Fairy shrimp, any of the crustaceans of the order Anostraca, so called because of their graceful movements and pastel colours. Some grow to 2.5 cm (about 1 inch) or more in length. They occur in freshwater ponds of Europe, Central Asia, western North America, the drier regions of Africa, and Australia.

Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration.

Krill, any member of the crustacean order Euphausiacea or of the genus Euphausia within that suborder. Euphausiids are shrimplike marine animals that are pelagic in habit (i.e., they live in the open sea).

Malacostracans are distributed worldwide in marine, freshwater, and terrestrial environments. There are roughly 25,000 species in as many as fifteen orders. Decapoda (crabs, lobsters, and shrimps) is the most speciose group within the Malacostraca. Malacostracans exhibit the hard, calcified exoskeleton typical of crustaceans.

Crustaceans (Crustacea / k r ʌ ˈ s t ... The crustacean group is usually treated as a subphylum, ... Maxillopoda: barnacles copepods: Calanoida Pedunculata Sessilia ...

Ostracods, or ostracodes, are a class of the Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 70,000 species (only 13,000 of which are extant) have been identified, grouped into several orders.

Pentastomida are an enigmatic group of parasitic crustaceans commonly known as tongue worms due to the resemblance of the species of the genus Linguatula to a vertebrate tongue. There are about 130 extant species of pentastomids; all are obligate parasites with correspondingly degenerate anatomy.

Phylogenetic analysis of Remipedia (Crustacea). Organisms Diversity & Evolution 7(1):33-51. Brooks, H.K. 1955. A crustacean from the Tesnus Formation of Texas.

Water flea, any member of the crustacean order Anomopoda (class Branchiopoda), a large group containing about 450 species distributed worldwide. Most forms are found in freshwater habitats, but a few occur in marine environments.

A woodlouse (plural woodlice) is a terrestrial isopod crustacean with a rigid, segmented, long exoskeleton and fourteen jointed limbs. Woodlice mostly feed on dead plant material, and they are usually active at night. Woodlice form the suborder Oniscidea within the order Isopoda, with over 5,000 known species.