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

The Copepoda are represented by the cyclops, or water flea. This form is common in sluggish streams and ditches. This is a female with egg sacs.

Water Flea

The Copepoda are represented by the cyclops, or water flea. This form is common in sluggish streams…

The water flea known as Cypris.

Water Flea

The water flea known as Cypris.

The water flea known as Daphnia.

Water Flea

The water flea known as Daphnia.

The water flea known as Cyclops.

Water Flea

The water flea known as Cyclops.

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. In Cyclops the body is more distinctly segmented and the shell is not bivalve; the head bears antennæ, mandibles, and maxillæ, and the first five segments of the thorax bear swimming appendages. Water fleas fed on microscopic plants and animals and on organic debris, while they themselves– often occurring in countless swarms– form an important part of the food supply of certain fishes."—(Charles Leonard-Stuart, 1911)

Cyclops communis Water Flea

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. In…

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. In Cypris also the shell is bivalve; there are five pairs of appendages on the head and two on the body; most of these are used in swimming or creeping. Among cyprids parthenogenesis again occurs, and in some species males have never been observed, while parthenogenetic development has been traced for as many as 40 successive generations. The females bear large egg sacs. Water fleas fed on microscopic plants and animals and on organic debris, while they themselves– often occurring in countless swarms– form an important part of the food supply of certain fishes."—(Charles Leonard-Stuart, 1911)

Cypris Unifasciata Water Flea

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. In…

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. The common Daphnia pulex, abundant in fresh water, is a good representative. The body is enclosed in a bivalve shell; there is a large single eye; a pair of large antennæ are used as swimming organs. The daphnids are marvellously prolific, and for prolonged periods parthenogenetic. There is an interesting difference between the winter eggs which require fertilization and the summer eggs which do not. The females have a dorsal brood chamber betwen the shell and the back. Water fleas fed on microscopic plants and animals and on organic debris, while they themselves– often occurring in countless swarms– form an important part of the food supply of certain fishes."—(Charles Leonard-Stuart, 1911)

Daphnia Pulex Water Flea

"Water Flea is a popular name for minute aquatic Crustaceans such as daphnia, cypris, and cyclops. The…

The amphipod, Gammarus ornatus.

Gammarus Ornatus

The amphipod, Gammarus ornatus.

This illustration shows the thorax of a crayfish with a portion of the carapace removed to show the gills.

Gills (Crayfish)

This illustration shows the thorax of a crayfish with a portion of the carapace removed to show the…

Hearing is the perception of certain vibrations of bodies. These vibrations give rise to sound waves. These sound waves come to animals through the air, through water, or throught both air and water. Here we see the auditory organ of a cray fish showing the auditory sac at the base.

Sense of Hearing

Hearing is the perception of certain vibrations of bodies. These vibrations give rise to sound waves.…

In the class of Crustacea there is a single ventricle, which receives the blood from the gills and propels it to other parts of the body. Shown is the heart and arteries of a lobster. Labels: 1, The heart. 2, The abdominal artery. 5, Venous sinuses. 6, The branchia from which the blood returns to the hear.

The Heart and Arteries of a Lobster

In the class of Crustacea there is a single ventricle, which receives the blood from the gills and propels…

Decapod crustaceans of the superfamily Paguroidea. Most hermit crabs salvage empty seashells to shelter and protect their soft abdomens.

Hermit Crab

Decapod crustaceans of the superfamily Paguroidea. Most hermit crabs salvage empty seashells to shelter…

"Hermit crab in the shell of a Gasteropod." — Galloway

Hermit Crab

"Hermit crab in the shell of a Gasteropod." — Galloway

Hermit crabs find vacant shells to make into their homes, seeking larger shells as it grows.

Hermit Crab

Hermit crabs find vacant shells to make into their homes, seeking larger shells as it grows.

"Hermit-crab withdrawn from its shell. The anterior appendages are broken off. hd., Head; th., thorax; abd., abdomen." -Thomson, 1916

Hermit Crab

"Hermit-crab withdrawn from its shell. The anterior appendages are broken off. hd., Head; th., thorax;…

This hermit crab (Eupagurus bernhardus) is in the shell of the northern moon snail (Lunatia heros).

Hermit Crab

This hermit crab (Eupagurus bernhardus) is in the shell of the northern moon snail (Lunatia heros).

"[The paguridae] includes the Hermit or Soldier Crab, <em>Pagurus Bernardus</em>, the abdominal portion of whose body is quite soft, forming a sort of cylindrical fleshy mass behind the shelly cephalothorax. As the comfort of the animal would be materially interfered with were this soft, worm-like appendage exposed to be grabbed at by every passing fish who might take a fancy to it, he usually seeks some shelter for its tail, and the habitation selected is generally the empty shell of some univalve mollusk." &mdash; Goodrich, 1859

Hermit-crab

"[The paguridae] includes the Hermit or Soldier Crab, Pagurus Bernardus, the abdominal portion…

"The <em>Parthenope horrida</em>, a native of the Atlantic and Indian Oceans, is covered with the most grotesque ornaments." &mdash; Goodrich, 1859

Parthenope horrida

"The Parthenope horrida, a native of the Atlantic and Indian Oceans, is covered with the most…

Isopods are one of the most diverse orders of Crustaceans, with many species living in all environments, and are common in shallow marine waters.

Isopod

Isopods are one of the most diverse orders of Crustaceans, with many species living in all environments,…

Entoniscus parasites is a parasitic isopod that feeds off and eventually replaces the tongues of fish and crabs.

Parasitic Isopod

Entoniscus parasites is a parasitic isopod that feeds off and eventually replaces the tongues of fish…

This illustration shows an isopoda. These are one of the most diverse orders of Crustaceans, with many species living in all environments, and are common in shallow marine waters.

Isopods

This illustration shows an isopoda. These are one of the most diverse orders of Crustaceans, with many…

A genus of crabs so called from their great size. They are found in the tropical and northern coasts of America, in the Antilles, Japan, and the archipelago southeast of Asia.

King Crab

A genus of crabs so called from their great size. They are found in the tropical and northern coasts…

"Violet Land-Crab." &mdash; Galloway

Land-Crab

"Violet Land-Crab." — Galloway

Flabellifera are a tribe of isopods. Their bodies end in a tail fan, made by the last pair of appendages and the telson (end piece). While some species of this tribe are parasitic, this particular species, Limnoria Lignorum, is non-parasitic, and has a destructive action on submerged wood. It is commonly referred to as the 'gribble'.

Limnoria Lignorum (Flabellifera)

Flabellifera are a tribe of isopods. Their bodies end in a tail fan, made by the last pair of appendages…

"Dorsal view of Limulus polyphemus, Latr." &mdash; The Encyclopedia Britannica, 1910

Limulus Polyphemus

"Dorsal view of Limulus polyphemus, Latr." — The Encyclopedia Britannica, 1910

External features of the lobster.

Lobster

External features of the lobster.

Lobsters have five pair of legs. The first pair are modified into claws for defense.

Lobster

Lobsters have five pair of legs. The first pair are modified into claws for defense.

Common lobster. I. first pair of legs; 2 and 3. second and third pairs of legs; 4 and 5. last two pair of legs; a smaller antennae; ga greater antennae; ca carapace.

Lobster

Common lobster. I. first pair of legs; 2 and 3. second and third pairs of legs; 4 and 5. last two pair…

Lobsters have two big claws and a muscular tail used for movement.

Lobster

Lobsters have two big claws and a muscular tail used for movement.

"Bilaterally symmetrical bodies composed of a series of rings or segments, each of which bears a pair of jointed appendages, or limbs; a well developed and symmetrical nervous system of many connected ganglia. The lower arthropoda are the crustaceans, such as the lobster." &mdash; Hinman, 1888

Lobster

"Bilaterally symmetrical bodies composed of a series of rings or segments, each of which bears a pair…

A large marine crustacean somewhat resembling a crawfish, but larger in form. The common lobster of America is a typical species. It is ten-footed, has a long tail, is stalk-eyed, and often attains a weight of ten pounds.

Lobster

A large marine crustacean somewhat resembling a crawfish, but larger in form. The common lobster of…

Larva of lobster removed from egg shell.

Lobster

Larva of lobster removed from egg shell.

The lobster, a crustacean.

Lobster

The lobster, a crustacean.

Lobster claw.

Lobster

Lobster claw.

An illustration of a lobster fossil.

Lobster Fossil

An illustration of a lobster fossil.

"Glass-crab (larva of Palinurus). GLASS-CRAB. A crab of the spurious genus Phyllosoma, or of the spurious order Phyllosomata-- that is, any young shrimp of either of the families Palinuridae and Scyllaridae. These larvae are as thin as paper, flat and transparent, and have no resemblance to the adult." -Whitney, 1911

Glass-Crab Lobster Larva

"Glass-crab (larva of Palinurus). GLASS-CRAB. A crab of the spurious genus Phyllosoma, or of the spurious…

Although not true lobsters, the slipper lobsters are decapod crustaceans closely related to spiny and furry lobsters.

Slipper Lobster

Although not true lobsters, the slipper lobsters are decapod crustaceans closely related to spiny and…

"The Spiny Lobster, <em>Palinurus vulgaris</em>, which may be taken as the type of the family, often weighs as muich as twelve or fifteen pounds. It was in great esteem among the ancient Romans, who denominated it <em>Locusta</em>. &mdash; Goodrich, 1859

Spiny lobster

"The Spiny Lobster, Palinurus vulgaris, which may be taken as the type of the family, often…

"Megalops of Cancer irroratus." &mdash; Galloway

Megalop

"Megalops of Cancer irroratus." — Galloway

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting tail. The body of the crab in its first larval stage is composed of short, globular portion, furnished with conspicuous long spines and a relaively long, jointed tail. This is call the zo&euml;a stage.

Metamorphosis of a Crab

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting…

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting tail. After the first stage, the zo&euml;a changes into a stage called the megalops, which has many characteristics of the adult crab condition. In this stage the crab looks very much like a tiny lobster or shrimp.

Metamorphosis of a Crab

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting…

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting tail. After the first stage, the zo&euml;a changes into a stage called the megalops, which has many characteristics of the adult crab condition. In this stage the crab looks very much like a tiny lobster or shrimp. In the final stage the tail disappears and the body widens.

Metamorphosis of a Crab

Crabs are decapod crustaceans of the infraorder Brachyura, which generally have a very short projecting…

"Mysis flexuosa, from side. b., Brood-pouch borne on posterior thoracic limbs; o., otocyst in tail. Note eight pairs of similar biramose thoracic feet. The last two thoracic segments are not covered by the shield." -Thomson, 1916

Mysis Flexuosa

"Mysis flexuosa, from side. b., Brood-pouch borne on posterior thoracic limbs; o., otocyst in tail.…

"Nebalia. SH., Shell; A.1, first antennae; A.2, second antennae; TH., 8 thoracic limbs; Ab.4, Ab.6, fourth and sixth abdominal limbs." -Thomson, 1916

Nebalia

"Nebalia. SH., Shell; A.1, first antennae; A.2, second antennae; TH., 8 thoracic limbs; Ab.4, Ab.6,…

"Norway Lobsters have the eyes uniform and the two last rings of the thorax movable."

Nephrops Norvegicus

"Norway Lobsters have the eyes uniform and the two last rings of the thorax movable."

"The Hermit or Soldier Crab is perhaps the oddest and most curious of the Crustaceans." Hermit Crabs seek out a shell to inhabit and will kill a living mollusk to take its home.

Pagurus Bernhardus, In the Shell

"The Hermit or Soldier Crab is perhaps the oddest and most curious of the Crustaceans." Hermit Crabs…

"The Hermit or Soldier Crab is perhaps the oddest and most curious of the Crustaceans." Hermit Crabs seek out a shell to inhabit and will kill a living mollusk to take its home.

Pagurus Bernhardus, Out of the Shell

"The Hermit or Soldier Crab is perhaps the oddest and most curious of the Crustaceans." Hermit Crabs…

"The common crayfish. Crustaceans are nearly all carnivorous. <em>a</em>, left outward root-jaw"

Palinurus Vulgaris

"The common crayfish. Crustaceans are nearly all carnivorous. a, left outward root-jaw"

Sacculina is a genus of barnacles that parasitize crabs. The female Sacculina larva finds a crab and walks on it until it finds a joint. It then molts, injecting its soft body into the crab while its shell falls off. The Sacculina grows in the crab, emerging as a sac, known as an externa, on the underside of the crab's rear thorax, where the crab's eggs would be incubated.

Crustacean Parasite

Sacculina is a genus of barnacles that parasitize crabs. The female Sacculina larva finds a crab and…

Sacculina is a genus of barnacles that parasitize crabs. The female Sacculina larva finds a crab and walks on it until it finds a joint. It then molts, injecting its soft body into the crab while its shell falls off. The Sacculina grows in the crab, emerging as a sac, known as an externa, on the underside of the crab's rear thorax, where the crab's eggs would be incubated. Here the parasite has been removed from the crab.

Crustacean Parasite

Sacculina is a genus of barnacles that parasitize crabs. The female Sacculina larva finds a crab and…

"Among some Crustaceans there is neither thorax, nor abdomen, nor head, but all three form only one mass, often short and squat, as in the Four-horned Spider-crab."

Pisa Tetraodon

"Among some Crustaceans there is neither thorax, nor abdomen, nor head, but all three form only one…

a: external antenna;b: external foot-jaw;c: tail or abdomen.

Portunus Variegatus, male

a: external antenna; b: external foot-jaw; c: tail or abdomen.

A small crustacean, allied to the shrimp; it is highly prized for food.

Prawn

A small crustacean, allied to the shrimp; it is highly prized for food.

The copepod stage of a prawn.

Prawn

The copepod stage of a prawn.

A small crustacean about 3 to 4 inches in length and marketed in vast numbers. Ate throughout the world.

Prawn

A small crustacean about 3 to 4 inches in length and marketed in vast numbers. Ate throughout the world.

A nauplius (plural nauplii) is the first larva of animals classified as crustaceans (subphylum of Arthropoda). It consists of a head and a telson. The thorax and abdomen, characteristic of adult crustaceans, have not developed yet. A prominent characteristic of nauplii is that they have only one compound eye, which will divide in two in later stages. Nauplii have three pairs of cephalic appendages with which they swim; in the adult these become the antennules, the antennae, and the mandibles. The name nauplii properly refers to crustacean larvae that use appendages that stem from the head (antennules and antennae) as their main means of swimming.

Nauplius of a Prawn

A nauplius (plural nauplii) is the first larva of animals classified as crustaceans (subphylum of Arthropoda).…

"The Purse Crab, <em>Birgus Latro</em> is a very curious species found in Amboyna and some of the adjacent islands. They inhabit the fissures of rocks along the sea-shore by day and come forth at night to search for food along the beach. When they meeta person they set up their claws in a threatening manner and snap their pincers and retreat backward. The natives say they climb the cocoanut-trees to get the cocoanuts." &mdash; Goodrich, 1859

Purse-crab

"The Purse Crab, Birgus Latro is a very curious species found in Amboyna and some of the adjacent…

"Alpheus-A genus of macrurous decapodous crustaceans, the type of the family Alpheid&aelig;."-Whitney, 1902

Red Shrimp

"Alpheus-A genus of macrurous decapodous crustaceans, the type of the family Alpheidæ."-Whitney,…

"A parasitic isopod crustacean, Aega psora, and some similar forms." -Whitney, 1911

Salve Bug

"A parasitic isopod crustacean, Aega psora, and some similar forms." -Whitney, 1911

"The Common Sand-hopper, <em>Talitrus locusta</em>, which may be met with in thousands upon thousands of European shores, is a well-known example of this family. Although its length is not much more than half an inch, it can leap several inches into the air, and the facility with which it escapes pursuit by burrowing into the soft wet sand is truly wonderful." &mdash; Goodrich, 1859

Sand-hopper

"The Common Sand-hopper, Talitrus locusta, which may be met with in thousands upon thousands…