An illustration of a boy and girl looking at a crab.

Boy & Girl Looking at Crab

An illustration of a boy and girl looking at a crab.

A crab pinching a young boys toe with a calf looking at him.

Boy and Crab

A crab pinching a young boys toe with a calf looking at him.

"The anterior feet are about the length of the body. The other feet terminate in an elongated claw, which is straight-pointed."

Corystes Cassivelaunus, female

"The anterior feet are about the length of the body. The other feet terminate in an elongated claw,…

"The Long-clawed Crab is remarkable for its long antennae, which considerably exceed the length of the body."

Corystes Cassivelaunus, male

"The Long-clawed Crab is remarkable for its long antennae, which considerably exceed the length of the…

Metamorphosis of the crab; the zoea stage.

Crab

Metamorphosis of the crab; the zoea stage.

Metamorphosis of the crab; the megalops stage.

Crab

Metamorphosis of the crab; the megalops stage.

Metamorphosis of the crab; the adult stage.

Crab

Metamorphosis of the crab; the adult stage.

Crabs have the same essentail structure as crayfishes and lobsters.

Crab

Crabs have the same essentail structure as crayfishes and lobsters.

This illustration shows a crab, a species of cancer. Crabs are decapod crustaceans with thick exoskeletons.

Crab

This illustration shows a crab, a species of cancer. Crabs are decapod crustaceans with thick exoskeletons.

"Transformations of the Crab: 1, young crab, or zoea, magnified; 2, young crab, in a more advanced stage, magnified; 3, young crab, in a more advanced stage, natural size; 4, young crab, when it has assumed its more perfect form, magnified; 5, young crab, when it has assumed its more perfect form, natural size." — Chambers' Encyclopedia, 1875

Crab

"Transformations of the Crab: 1, young crab, or zoea, magnified; 2, young crab, in a more advanced stage,…

An illustration of a crap carrying a mass of eggs beneath its abdomen.

Crab

An illustration of a crap carrying a mass of eggs beneath its abdomen.

Eriphia laevimana is a crustacean in the Cancridae family of crabs.

Crab

Eriphia laevimana is a crustacean in the Cancridae family of crabs.

"These have the shell regularly rounded in front and narrowed behind; the legs are of moderate length, the claws large, and often unequal in size. This species inhabits deep water, and is captured in large quantities by sinking baskets, pots, or nets, baited with carrion, in place which it is known to frequent." — Goodrich, 1859

Common European crab

"These have the shell regularly rounded in front and narrowed behind; the legs are of moderate length,…

The edible crab (Cancer pagurus) is a species of crab found in the North Sea, North Atlantic, and the Mediterranean Sea.

Edible Crab

The edible crab (Cancer pagurus) is a species of crab found in the North Sea, North Atlantic, and the…

Maja squinado (the European spider crab, spiny spider crab or spinous spider crab) is a species of migratory crab found in the north-east Atlantic and the Mediterranean Sea. It feeds on a great variety of organisms, with seaweeds and molluscs dominating in winter, and echinoderms such as sea urchins and sea cucumbers in summer. Females can produce up to 4 broods per year. Migrations generally take place in autumn, with some crabs covering over 100 miles (160 km) in eight months.

European Spider Crab

Maja squinado (the European spider crab, spiny spider crab or spinous spider crab) is a species of migratory…

When alarmed, the hermit crab withdraws itself wholly into its portable house, closing the mouth of the shell with one of its claws, (Hooker, 1882).

Hermit Crab

When alarmed, the hermit crab withdraws itself wholly into its portable house, closing the mouth of…

"When alarmed, the hermit crab withdraws itself wholly into its portable house, closing the mouth of the shell with one of its claws, "(Hooker, 1882).

Hermit Crab

"When alarmed, the hermit crab withdraws itself wholly into its portable house, closing the mouth of…

Hermit crab in shell of sea snail.

Hermit Crab

Hermit crab in shell of sea snail.

"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.…

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,…

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

Red Sea crab

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

An illustration of the sentinel spinous crab.

Sentinel Spinous Crab

An illustration of the sentinel spinous crab.

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…

Blind crayfish of Mammoth Cave.

Blind Crayfish

Blind crayfish of Mammoth Cave.

Girl with a book and sea life around her.

Girl

Girl with a book and sea life around her.

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

Hermit Crab

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

"[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…

"Violet Land-Crab." &mdash; Galloway

Land-Crab

"Violet Land-Crab." — Galloway

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.

The only medal known to inscribe the name of the town.  It depicts a crab, which holds in its claws the symbols of the sun and moon.

Medal of Gebal

The only medal known to inscribe the name of the town. It depicts a crab, which holds in its claws the…

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…

"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"

"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.

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.

"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…

24. Various corals, 25. Razor-shell, 26. Cockle, 27. Various winkels, 28. Shore crab, 29. Father lasher, 30. Periophthalamus, 31. Lobworm, 32. Gunnel

Types of Seashore Life

24. Various corals, 25. Razor-shell, 26. Cockle, 27. Various winkels, 28. Shore crab, 29. Father lasher,…

A short and wide sea shell.

Shell

A short and wide sea shell.

A spiral shaped sea shell.

Shell

A spiral shaped sea shell.

"In these the back is usually covered with spines and hairs. They generally live in deep water, and rarely approach the shore." &mdash; Goodrich, 1859

Spinous spider-crab

"In these the back is usually covered with spines and hairs. They generally live in deep water, and…

"The <em>Eriphea spinifrons</em>, for instance, distributed in nearly all seas, has the front covered with numerous sharp spines." &mdash; Goodrich, 1859

Eriphia spinifrons

"The Eriphea spinifrons, for instance, distributed in nearly all seas, has the front covered…

"The lowest division of articulate animals is the Crustacea. Their name signifies a hard crust of covering, with which the animals are protected."

Zoea Taurus

"The lowest division of articulate animals is the Crustacea. Their name signifies a hard crust of covering,…