ClipArt gallery featuring 222 illustrations of crustacean species, such as crabs, lobsters, crayfish, and shrimp.

Hermit crab in shell of sea snail.

Hermit Crab

Hermit crab in shell of sea snail.

A small crab with no permanent shell. It must move from shell to shell to grow.

Hermit Crab

A small crab with no permanent shell. It must move from shell to shell to grow.

An illustration of a hermit crab in a shell.

Hermit Crab

An illustration of a hermit crab in a shell.

Pagurus bernhardus is the common marine hermit crab of Europe's Atlantic coasts. It is sometimes referred to as the common hermit crab or soldier crab. It is about 3½ cm long ,and is found in both rocky and sandy areas, from the Arctic waters of Iceland, Svalbard and Russia as far south as southern Portugal, but its range does not extend as far as the Mediterranean Sea.

Hermit Crab

Pagurus bernhardus is the common marine hermit crab of Europe's Atlantic coasts. It is sometimes referred…

Hermit crabs are decapod crustaceans of the superfamily Paguroidea. They are not closely related to true crabs. Hermit crabs are quite commonly seen in the intertidal zone, for example in tide pools. Most species of hermit crabs have long soft abdomens which are protected from predators by the adaptation of carrying around a salvaged empty seashell, into which the whole crab's body can retract. Most frequently hermit crabs utilize the shells of sea snails, marine gastropod mollusks. The tip of the hermit crab's abdomen is adapted to clasp strongly onto the columella of the snail shell. As the hermit crab grows in size, it has to find a larger shell and abandon the previous one.

Hermit Crab

Hermit crabs are decapod crustaceans of the superfamily Paguroidea. They are not closely related to…

Crabs with a dark brown shell and a long stiff tail.

Horse-shoe Crab

Crabs with a dark brown shell and a long stiff tail.

"It is among the largest of crustaceous animals, sometimes measuring as much as two feet in length. The body is composed of two divisions - an anterior, crescent-shaped piece, or carapace, and a posterior, somewhat hexagonal piece, formed by the coalescence of the abdominal segments." — Goodrich, 1859

King crab

"It is among the largest of crustaceous animals, sometimes measuring as much as two feet in length.…

A broad flat crab with small pinchers.

Lady Crab

A broad flat crab with small pinchers.

A large crab.

Mask Crab

A large crab.

Corystes cassivelaunus, the masked crab, helmet crab or sand crab, is a burrowing crab of the North Atlantic and North Sea from Portugal to Norway, which also occurs in the Mediterranean Sea. It may grow up to 4 cm long (carapace length). The name "masked crab" derives from the patterns on the carapace which resemble a human face, in a similar manner to heikegani.

Masked Crab

Corystes cassivelaunus, the masked crab, helmet crab or sand crab, is a burrowing crab of the North…

Crabs have the same essentail structure as crayfishes and lobsters.

Oyster Crab

Crabs have the same essentail structure as crayfishes and lobsters.

The pea crab is a small crab in the family Pinnotheridae that lives symbiotically in oysters, clams, mussels and other species of bivalves. The crab is usually about the size of a pea but can grow as large as a small walnut. It is also commonly known as the oyster crab. Females have a large tail flap that is used to cover eggs attached to the bodies when they are breeding, adding to the spherical appearance.

Pea Crab

The pea crab is a small crab in the family Pinnotheridae that lives symbiotically in oysters, clams,…

A large red&mdashorange crab with two medium size pinchers.

Red Crab

A large red&mdashorange crab with two medium size pinchers.

"The Red Sea Crab - Lupea Pelagica" — Goodrich, 1859

Red Sea crab

"The Red Sea Crab - Lupea Pelagica" — Goodrich, 1859

A crab found on the rocky sea floor.

Rock Crab

A crab found on the rocky sea floor.

An illustration of the sentinel spinous crab.

Sentinel Spinous Crab

An illustration of the sentinel spinous crab.

"Dorsal aspect of shore crab (Carcinnus). Abd., Abdomen; A1., antennules; A2., antennae; E., eyes; F., forceps." -Thomson, 1916

Shore Crab

"Dorsal aspect of shore crab (Carcinnus). Abd., Abdomen; A1., antennules; A2., antennae; E., eyes; F.,…

Carcinus maenas is a common littoral crab, and an important invasive species. It is listed among the 100 "world's worst invasive types of invasive species". C. maenas is known by different names around the world. In the British Isles, it is generally referred to simply as the shore crab. In North America and South Africa, it bears the name green crab or European green crab. In Australia and New Zealand, it is referred to as either the European green crab or European shore crab.

Shore Crab

Carcinus maenas is a common littoral crab, and an important invasive species. It is listed among the…

Crabs are ten-footed crustaceans. The abdomen is tucked out of site, so that nothing is visible except the carapace.

Spider-Crab

Crabs are ten-footed crustaceans. The abdomen is tucked out of site, so that nothing is visible except…

A crab that usually hides in sponges on the ocean floor. It apears soft because of the algae that grows on it.

Sponge Crab

A crab that usually hides in sponges on the ocean floor. It apears soft because of the algae that grows…

"Dorsal aspect of swimming crab (Portunus). P., Paddle; Abd., abdomen; A1., antennules; A2., antennae; E., eyes; F., forceps." -Thomson, 1916

Swimming Crab

"Dorsal aspect of swimming crab (Portunus). P., Paddle; Abd., abdomen; A1., antennules; A2., antennae;…

The velvet crab (alternatively velvet swimming crab or devil crab) is the largest swimming crab found in British coastal waters, with a carapace width of up to 100 mm. The body is coated with short hairs, giving the animal a velvety texture, hence the common name. It is one of the major crab species for UK fisheries. The velvet crab lives from southern Norway to Western Sahara in the North Sea and north Atlantic as well as western parts of the Mediterranean Sea, on rocky bottoms from the shoreline to a depth of about 65 m. The last pair of pereiopods are flattened to facilitate swimming.

Velvet Crab

The velvet crab (alternatively velvet swimming crab or devil crab) is the largest swimming crab found…

An illustration of the violet land crab, Gecarcinus ruricola.

Violet Land Crab

An illustration of the violet land crab, Gecarcinus ruricola.

An illustration of hermit craps shedding their shells and finding new ones. As hermit crabs grow they require larger shells. Since suitable intact gastropod shells are a limited resource, there is frequently strong competition among hermit crabs for the best available shells. The availability of empty snail shells at any given place depends primarily on the relative abundance of gastropods in the right range of sizes, compared to the demographics of the population of hermit crabs.

Hermit Crabs

An illustration of hermit craps shedding their shells and finding new ones. As hermit crabs grow they…

"Also known as Florida lobster. This Southern species, a "spiny" lobster, found off the southern Florida coasts and among the keys is distinguished from the northern variety by the absence of claws and the presence of two long antenna protruding from the head."

Crawfish

"Also known as Florida lobster. This Southern species, a "spiny" lobster, found off the southern Florida…

"Crawfish, or Crayfish is a name of various crustaceous animals, the common crawfish being the river lobster. It lurks under stones or in holes in the banks. Its food consists of small mollusks or fishes, the larvæ of insects, and almost any sort of animal matter. Some crawfish by their burrowing habits injure mill-dams and the levees of the Mississippi."—(Charles Leonard-Stuart, 1911)

Crawfish

"Crawfish, or Crayfish is a name of various crustaceous animals, the common crawfish being the river…

"River-Crawfish (Astacus fluviatilis). (From Huxley's "Crayfish.")"- Whitney, 1902

Crawfish

"River-Crawfish (Astacus fluviatilis). (From Huxley's "Crayfish.")"- Whitney, 1902

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they are closely related. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. Most crawfish cannot tolerate polluted water, although some species such as the invasive Procambarus clarkii are more hardy. Some crayfish have been found living as much as 3 m (10 feet) underground.

Crawfish

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they…

"A, Developed Endopodite, or ordinary ambulatory leg of the crawfish as a thoracic appendage: ab, the whole extent of the endopodite with seven joints; 1, coxopodite; 2, basipodite; 3, ischiopodite; 4, meropodite; 5, capopodite; 6, propodte; 7, dactylopodite; e, filaments borne on coxopodite; d, an epipodite. B and C, appendages respectively of first and second abdominal somite of th male: ab, endopodite; c, exopodite." -Whitney, 1911

Crawfish Leg

"A, Developed Endopodite, or ordinary ambulatory leg of the crawfish as a thoracic appendage: ab, the…

A fluviatile longtailed crustacean.

River Crawfish

A fluviatile longtailed crustacean.

"Diagrammatic cross-section of Cray-fish in the thoracic region, to show relation of circulation and respiration. a, appendage; c, carapace; c.f., flap of carapace overhanging the gills; d, digestive tube; g, gill; h, heart; l, liver; m, body muscles; m', muscles of the appendages; n.c., nerve cord; p.s., paricardial sinus; r, reproductive glands; st, sternal artery; v.a., ventral artery; v.s., ventral blood sinus in which the nerve cord lies." — Galloway

Cray-fish

"Diagrammatic cross-section of Cray-fish in the thoracic region, to show relation of circulation and…

Cross-section of abdomen of crayfish.

Crayfish

Cross-section of abdomen of crayfish.

Longitudinal-section of a crayfish, showing digestive, circulatory, reproductive, excretory, and nervous systems.

Crayfish

Longitudinal-section of a crayfish, showing digestive, circulatory, reproductive, excretory, and nervous…

Nervous system of crayfish.

Crayfish

Nervous system of crayfish.

The arthropod, the freshwater crayfish.

Crayfish

The arthropod, the freshwater crayfish.

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they are probably closely related. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. Most crayfish cannot tolerate polluted water, although some species such as the invasive Procambarus clarkii are more hardy. Some crayfish have been found living as much as 3 m (10 feet) underground.

Crayfish

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they…

Blind crayfish of Mammoth Cave.

Blind Crayfish

Blind crayfish of Mammoth Cave.

Types of the Lower Crustacea. 1, Balanus; 2, Cytherea lutea; 3, Dapania pulex; 4, Lepus anatifera; 5, Artemia salina; 6, Nebalia bipes; 7, Apocudes speciosus; 8, Orchestia selkirki; 9, Gribble; 10, Woodlouse; 11, Cyclaspis pusilla; 12, Squilla nautis; 13, Mysis relicta; 14, Hermit crab.  1, 4, 12 and 14 reduced to one-half; 2, 3 and 5 are magnified.

Crustacea

Types of the Lower Crustacea. 1, Balanus; 2, Cytherea lutea; 3, Dapania pulex; 4, Lepus anatifera; 5,…

Copepoda, an order of crustaceans. e, Calligus Mulleri, or horseshoe crab.

Crustacean

Copepoda, an order of crustaceans. e, Calligus Mulleri, or horseshoe crab.

A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacean, and is hence distantly related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile suspension feeders, and have two nektonic larval stages. Barnacles are encrusters, attaching themselves permanently to a hard substrate. Shown is a barnacle larva.

Barnacles

A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacean, and…

A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacean, and is hence distantly related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile suspension feeders, and have two nektonic larval stages. Barnacles are encrusters, attaching themselves permanently to a hard substrate. Shown is a developed adult barnacle.

Barnacles

A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacean, and…

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they are related. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators

Crayfish

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they…

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they are related. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. This disscetion of a crayfish shows the following: (b) brain, (h) heart, (i) intestine, (k) kidney, (l) liver, (n) nerve cord, (r) reproductive organ, (s) stomach.

Crayfish

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they…

Cyclops, the representative of a number of lowly forms belonging to the order of Copepods, is one of the commest fresh-water Crustacea. The forward segments of the spindle-shaped body are covered by a large shield or carapace. The feet, are few in number, and like its fabled namesake, it bears an eye in the center of the forehead. Diagram of the cyclops shows the (e.s.) egs, (i) intestine, (ov) reproductive organ.

Cyclops

Cyclops, the representative of a number of lowly forms belonging to the order of Copepods, is one of…

The class of crustacea is divided into two sub-classes, Entomostraca and Malacostraca. The first, Entomostraca, contains the fairy-shrimps (Branchipus). A simple Crustacean, the fairy shrimp body is distinctly separated into head, thorax, and abdomen. This diagram shows parts of the fairy-shimp, (b) brood-pouch, (e,e') compound and simple eyes, (f) paddle-shaped feet, (h) tubular heart, and (i) intestine.

Fairy-shrimp

The class of crustacea is divided into two sub-classes, Entomostraca and Malacostraca. The first, Entomostraca,…

The marine isopod or sand flea (Gammarus) is in the sand, under rocks, and in the seaweed. Many are parasitic upon fishes. Gammarus is an amphipod crustacean genus in the family Gammaridae.

Marine Isopod

The marine isopod or sand flea (Gammarus) is in the sand, under rocks, and in the seaweed. Many are…

The marine isopod or sand flea (Caprella) is an omnivorous feeder that eats detritus, one-celled plants, small invertebrates. It is preyed upon by shrimp, sea anemones and several fish species. Females of some species of skeleton shrimp apparently kill the males after mating using a poisonous claw.

Marine Isopod

The marine isopod or sand flea (Caprella) is an omnivorous feeder that eats detritus, one-celled plants,…

Prawns are crustaceans, belonging to the sub-order Dendrobranchiata. They are similar in appearance to shrimp, but can be distinguished by the gill structure which is branching in prawns (hence the name, dendro="tree"; branchia="gill"), but is lamellar in shrimp.

Prawn

Prawns are crustaceans, belonging to the sub-order Dendrobranchiata. They are similar in appearance…

The larger, more useful and more familiar Crustacea belong to the subclass Malacostraca. It comprises such animals as the shrimps, crayfish, lobsters, crabs, and a number of other forms. The simplist of these are the opossum-shrimps (Mysis americana). In general appearance they resemle crayfishes or prawns. They are readily distinguished by the two-branched thoracic feet.

Shrimp

The larger, more useful and more familiar Crustacea belong to the subclass Malacostraca. It comprises…

An isopod crustacean found on whales.

Whale Crustacean

An isopod crustacean found on whales.

"The best-known form of the Copepoda is the genus <em>Cyclops</em>, specimens of whch may be found in every stagnant pool; it is the type of the family Cyclopidae, characterized by the possession of a single eye." &mdash; Goodrich, 1859

Cyclops

"The best-known form of the Copepoda is the genus Cyclops, specimens of whch may be found in…

"Cyclops type. I A., first antenna; II A., second antenna; OV., ovary; R.S., receptaculum seminis; OS., ovisac; F., caudal fork." -Thomson, 1916

Cyclops

"Cyclops type. I A., first antenna; II A., second antenna; OV., ovary; R.S., receptaculum seminis; OS.,…

A fancy shell.

Cypria

A fancy shell.

"Cypris, side view, after removal of one valve. e., Eye; A.1, first antennae; A.2, second antennae; MN., mandibles; mx.1, first maxilla; mx.2, second maxilla; f.1, f.2, thoracic legs; Ab., rudimentary abdomen." -Thomson, 1916

Cypris

"Cypris, side view, after removal of one valve. e., Eye; A.1, first antennae; A.2, second antennae;…

Cypris, a modern ostracod. Female before sexual maturity, right valve of shell removed to show internal anatomy.

Cypris

Cypris, a modern ostracod. Female before sexual maturity, right valve of shell removed to show internal…

"Daphnia. E., Eye; A.2, second antenna; A.1, first antenna; dg., digestive caeca; s.g., shell gland; go., gonad; h., heart in pericardium; o., ovum; B.p., brood-pouch; sp., spine; f., furca; s., setae; Ab., rudimentary abdomen; t., caudal fork; g., gut; 1-5, thoracic limbs." -Thomson, 1916

Daphnia

"Daphnia. E., Eye; A.2, second antenna; A.1, first antenna; dg., digestive caeca; s.g., shell gland;…

"Edriophthalma: 1, Caprella phasma; 2, Cyamus Balaenarius." &mdash; Chambers' Encyclopedia, 1875

Edriophthalma

"Edriophthalma: 1, Caprella phasma; 2, Cyamus Balaenarius." — Chambers' Encyclopedia, 1875

Estheria californica is a species of Branchiopod crustaceans most closely resembling the shrimp.

Estheria

Estheria californica is a species of Branchiopod crustaceans most closely resembling the shrimp.

A, section through the compound eye of a crayfish. Labels: 1, cornea; 2, crystaline cones; 3, retinulae; 4, pigment cells; 5, cuticle; 6, epithelium; n, optic nerve; g, ganglia. B, A single element (ommatidium) from the compound eye of a crayfish. Labels: 1, corneal lens; 2, corneal cells; 3, crystalline cone cells; 4, 5, outer and inner parts of the crystalline cone; p, pigment cells; r, retinula; R, rhabdome; b, basement membrane.

Eye of a Crayfish

A, section through the compound eye of a crayfish. Labels: 1, cornea; 2, crystaline cones; 3, retinulae;…

"The fiddler-crab has one large claw and one small one; the large claw is held in such a manner as to suggest a violin, and the small one in such a position as to represent the bow."

Fiddler-crab

"The fiddler-crab has one large claw and one small one; the large claw is held in such a manner as to…