This ClipArt gallery includes 130 illustrations of squid, octopus, nautilus, and ammonites. These animals are members of the mollusk (or mollusc) class of cephpalopods, named cephalopoda.

The Common Cuttlefish (Sepia officinalis) is a mollusc in the Sepiidae family of cephalopods.

Common Cuttlefish

The Common Cuttlefish (Sepia officinalis) is a mollusc in the Sepiidae family of cephalopods.

An egg-cluster of squid.

Squid Egg

An egg-cluster of squid.

A cuttle fish.

Cuttlefish

A cuttle fish.

"Giant Squid (Architeuthis dux). (From Report of U.S. Fish Commission, 1884.)-Whitney, 1902

Giant Squid

"Giant Squid (Architeuthis dux). (From Report of U.S. Fish Commission, 1884.)-Whitney, 1902

The extinct ammonoid mollusk, Goniatites sphericus.

Goniatites sphericus

The extinct ammonoid mollusk, Goniatites sphericus.

"Hectocotylus of Tremoctopus violaceus." — Encyclopedia Britannica, 1893

Hectocotylus

"Hectocotylus of Tremoctopus violaceus." — Encyclopedia Britannica, 1893

A fossilized shell.

Lituites

A fossilized shell.

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity, driving back the water by means of their funnel."

Loligo Gahi (d'Orbigny)

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity,…

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity, driving back the water by means of their funnel."

Loligo Vulgaris, with its pen, or internal bone (Lamarck)

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity,…

Chambered nautilus, showing chambers with soft body in outer chamber. It is closely related to the squids and cuttlefishes, but has the body enclosed in a flat-spiral shell.

Nautilus

Chambered nautilus, showing chambers with soft body in outer chamber. It is closely related to the squids…

The nautilus is a true mollusc. (a) mantle; (o) eye; (t) tentacles; (f) funnel.

Nautilus

The nautilus is a true mollusc. (a) mantle; (o) eye; (t) tentacles; (f) funnel.

"Section of a nautilus showing its interior." — Goodrich, 1859

Nautilus

"Section of a nautilus showing its interior." — Goodrich, 1859

The name applied formerly to a large genus of mollusks. At present it is confined to only three existing species. Fossil remains indicate that more than one hundred species lived in the different geological periods.

Nautilus

The name applied formerly to a large genus of mollusks. At present it is confined to only three existing…

A marine creature of the class Cephalopoda. They are found only in the western Pacific, inhabiting waters around coral reefs.

Nautilus

A marine creature of the class Cephalopoda. They are found only in the western Pacific, inhabiting waters…

"Oral surface of a male (A) and female (B) Nautilus pompilius in an expanded state. a, shell; b, external annular lobe carrying 19 tentacles on each side, and anteriorly enlarged to form the hood; c, right and left inner lobes, each carrying 12 tentacles in the female, and divided in the male into two parts; d, posterior inner lobe; e, oral cone; f, tentacles of the outer annular lobe projecting from their sheaths; g, two anterior tentacles of this lobe belonging to the hood; i, superior, k, inferior, ophthalmic tentacle; l, eye; n, lamellated organ on the posterior inner lobe of the female; o, funnel; p, spadix; q, antispadix." -Parker, 1900

Nautilus Oral Surface

"Oral surface of a male (A) and female (B) Nautilus pompilius in an expanded state. a, shell; b, external…

"In the last partition of the shell is the animal, covered by its mantle, which lines to walls of the partitions. The mouth of the nautilus is armed with mandibles, fashioned somewhat like a parrot's beak."

Nautilus Pompilius (Linnaeus), showing the interior of the lower cell, to which the animal is fixed.

"In the last partition of the shell is the animal, covered by its mantle, which lines to walls of the…

"Section of shell of Nautilus." -Thomson, 1916

Nautilus Shell

"Section of shell of Nautilus." -Thomson, 1916

An illustration of a female nautilus without the shell. "m, The dorsal "hood" formed by the enlargement of the outer or annular lobe of the forefoot, and corresponding to the sheaths of two tentacles; n. Tentacular sheaths of lateral portion of the annular lobe; u, The left eye; b, The nuchal plate, continuous at its right and left posterior angles with the root of the mid-foot, and corresponding to the nuchal cartilage of Sepia; c, Visceral hump; d, The free margin of the mantle-skirt,...; g.a, Points to the lateral continuation of the nuchal plate b to join the root of the mid foot of siphon." (Britannica, 1910).

Female Nautilus without Shell

An illustration of a female nautilus without the shell. "m, The dorsal "hood" formed by the enlargement…

An illustration of a female nautilus without the shell. "c, points to the concave margin of the mantle-skirt leading into the sub-pallial chamber; g, the mid-foot or siphon; k, the superficial origin of its retractor muscles closely applied to the shell and serving to hold the animal in tis place; l, the sipjuncular pedicle of the visceral hump broken off short; v,v, the superior and inferior ophthalmic tentacles." (Britannica, 1910)

Female Nautilus without Shell

An illustration of a female nautilus without the shell. "c, points to the concave margin of the mantle-skirt…

An illustration of the postero-ventral view female nautilus without the shell. "a, Muscular band passing from the mid-foot to the integument; b, The valve on the surface of the funnel, partially concealed by the inrolled lateral margin of the latter; c, The mantle-skirt retroverted; an, The median anus; x, Post-anal papilla of unknown significance; g.n., Nidamental gland ; r.ov, Aperture oft he right oviduct; l.ov, Aperture of the rudimentary left oviduct; neph.a, Aperture of the left anterior renal sac; neph.p, Aperture of the left posterior renal sac; viscper, Left aperture of the viscero-pericardial sac; olf, The left osphradium placed near the base of the anterior gill-plume." (Britnnica, 1910)

Female Nautilus without Shell

An illustration of the postero-ventral view female nautilus without the shell. "a, Muscular band passing…

"Section of the shell of Nautilus pompilius, showing the septa (s, s), the septal necks (s. n., s. n.), the siphuncle (si, represented by dotted lines), and the large body-chamber (ch)." -Parker, 1900

Chambered Nautilus

"Section of the shell of Nautilus pompilius, showing the septa (s, s), the septal necks (s. n., s. n.),…

The modern Pearly Nautilus; the animal occupies the living chamber of the sectioned shell.

Chambered Nautilus

The modern Pearly Nautilus; the animal occupies the living chamber of the sectioned shell.

An illustration of a female (bottom) and male (top) nautilus.

Female and Male Nautilus

An illustration of a female (bottom) and male (top) nautilus.

The paper nautilus is closely related to the octopus. It creates its own thin shell, or egg case, in which it hides when disturbed.

Paper Nautilus

The paper nautilus is closely related to the octopus. It creates its own thin shell, or egg case, in…

The paper nautilus is closely related to the octopus. It creates its own thin shell, or egg case, in which it hides when disturbed.

Paper Nautilus

The paper nautilus is closely related to the octopus. It creates its own thin shell, or egg case, in…

The paper-nautilus is closely related to the Octopus.

Paper Nautilus

The paper-nautilus is closely related to the Octopus.

The cephalopod, the paper nautilus (female).

Paper Nautilus

The cephalopod, the paper nautilus (female).

Octopus, a mollusk related to the squid. It has eight arms with suckers, arranged around a central soft, baggy body.

Octopus

Octopus, a mollusk related to the squid. It has eight arms with suckers, arranged around a central soft,…

Octopus, a mollusk related to the squid. It has eight arms with suckers, arranged around a central soft, baggy body.

Octopus

Octopus, a mollusk related to the squid. It has eight arms with suckers, arranged around a central soft,…

As the name indicates, the octopus has eight arms instead of ten, as in the squids and cuttles.

Octopus

As the name indicates, the octopus has eight arms instead of ten, as in the squids and cuttles.

Part of the cephalopod group. The name cephalopod is derived from two greek words which mean feet on head.

Octopus

Part of the cephalopod group. The name cephalopod is derived from two greek words which mean feet on…

"The Octopus is the typical genus of the family Octopodidæ. The body is oval, warty, or cirrose, finless; arms long, unequal, suckers in two rows, mantle supported in front by the branchial septum. In the male the third right arm is hectocotylized. Found on the coasts of the temperate and tropical zones. Forty-six species are known, varying in length from one inch only to a number of feet. They are solitary animals, frequenting rocky shores, and are very active and voracious, the females oviposit on seaweeds or in empty shells. The term 'octopus' is applied in the United States to monopolies supposed to resemble the octopus in their grasping and voracious character."—(Charles Leonard-Stuart, 1911)

Octopus

"The Octopus is the typical genus of the family Octopodidæ. The body is oval, warty, or cirrose,…

A genus of fishes beloning to the cephalopod group, and also known as cuttlefishes. They have a warty, oval body, eight arms of unequal length, and consist of fourty-six known species.

Octopus

A genus of fishes beloning to the cephalopod group, and also known as cuttlefishes. They have a warty,…

"A genus of dimiliarly known as cuttle-fishes. They have eight arms, each with two rows of suckers, which are sessile or unstalked. The prominent head is joined to the body by a distinct neck, and the body itself is short, generally more or less rounded in shape, and unprovided with side or lateral fins. They have attained a notoriety from tales circulated concerning their ferocity and the existence of gigantic members of the genus, though the largest cuttle-fishes that have been met with have belonged to other genera." — Winston's Encyclopedia, 1919

Octopus

"A genus of dimiliarly known as cuttle-fishes. They have eight arms, each with two rows of suckers,…

"The Devil-fish (Octopus). A, at rest; B, swimming. a, arms, with suckers on the inner aspect; e, eye; s, siphon or funnel." -Galloway, 1915

Octopus

"The Devil-fish (Octopus). A, at rest; B, swimming. a, arms, with suckers on the inner aspect; e, eye;…

Graneledone verrucosa is a species of cephalopods in the Octopodidae family of octopuses.

Octopus

Graneledone verrucosa is a species of cephalopods in the Octopodidae family of octopuses.

"A very ugly-looking creature, which belongs to the <em>Octopodidae</em> family, is the Octopus."

Octopus Brevipes (d'Orbigny)

"A very ugly-looking creature, which belongs to the Octopodidae family, is the Octopus."

"A very ugly-looking creature, which belongs to the <em>Octopodidae</em> family, is the Octopus."

Octopus Horridus (d'Orbigny)

"A very ugly-looking creature, which belongs to the Octopodidae family, is the Octopus."

"A very ugly-looking creature, which belongs to the <em>Octopodidae</em> family, is the Octopus."

Octopus Macropus (Risso)

"A very ugly-looking creature, which belongs to the Octopodidae family, is the Octopus."

"A very ugly-looking creature, which belongs to the <em>Octopodidae</em> family, is the Octopus."

Octopus Vulgaris (Lamarck)

"A very ugly-looking creature, which belongs to the Octopodidae family, is the Octopus."

The blanket octopuses, four species of octopus in the Tremoctopus genus, are found in the waters of Australia's Northern Coast.

Blanket Octopus

The blanket octopuses, four species of octopus in the Tremoctopus genus, are found in the waters of…

The argonauts (genus Argonauta, the only extant genus in the Argonautidae family) are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. Female argonauts produce a laterally-compressed calcareous eggcase in which they reside.

Paper Nautilus Octopuses

The argonauts (genus Argonauta, the only extant genus in the Argonautidae family) are a group of pelagic…

The argonauts (genus Argonauta, the only extant genus in the Argonautidae family) are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. Argonauts use tentacles to grab prey and drag it toward the mouth.

Paper Nautilus Octopuses

The argonauts (genus Argonauta, the only extant genus in the Argonautidae family) are a group of pelagic…

"Argonauta argo, the "Paper Nautilus," female. The animal is represented in its shell, but the webbed dorsal arms are separated from the shell, which they ordinarily embrace." &mdash; Encyclopedia Britannica, 1893

Paper Nautilus

"Argonauta argo, the "Paper Nautilus," female. The animal is represented in its shell, but the webbed…

"The Paper Nautilus (Argonauta argo). e, eye; m, mouth; f, siphon; sh, shell; t, tentacles." -Galloway, 1915

Paper Nautilus

"The Paper Nautilus (Argonauta argo). e, eye; m, mouth; f, siphon; sh, shell; t, tentacles." -Galloway,…

"Pearly Nautilus. e, eye; h, hood, a muscular portion of the foot which protects the softer parts; s, siphon; se, septa, separating the successive chambers of the shell; sp, siphuncle; t, tentacles." &mdash; Galloway

Pearly Nautilus

"Pearly Nautilus. e, eye; h, hood, a muscular portion of the foot which protects the softer parts; s,…

"Pearly nautilus with half the shell removed." &mdash;Davison, 1906

Pearly Nautilus

"Pearly nautilus with half the shell removed." —Davison, 1906

The Pearly Nautilus (Nautilus Pompilius) is the only living representative of a unique form of cephalopod, recorded in fossils for over 500 million years. The shell, pearly and beautifully colored, is spirally formed and consists of a series of chambers separated by curved cross plates thus exemplifies the "chambered shell". The nautilus is a bottom feeder on Crustaceans, usually in deep water.

Pearly Nautilus

The Pearly Nautilus (Nautilus Pompilius) is the only living representative of a unique form of cephalopod,…

An illustration of pinnoctopus cordiformis, a type of cephalopods. The cephalopods are the mollusc class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusk foot, a muscular hydrostat, into the form of arms or tentacles. Teuthology, a branch of malacology, is the study of cephalopods.

Pinnoctopus Cordiformis

An illustration of pinnoctopus cordiformis, a type of cephalopods. The cephalopods are the mollusc class…

This creature, belonging to the <em>Octopodidae</em> family, "changes its color under any exertion, so that the animal at rest and in motion are two different beings."

Pinnoctopus Cordiiformis (Q. & G.)

This creature, belonging to the Octopodidae family, "changes its color under any exertion,…

"In the sub-order Rhizostomae the edges of the oral opening use together at an early age and leave several sucker-like secondary mouths, which were formerly mistaken for independent persons." &mdash; Encyclopedia Britannica, 1893

Rhizostomae

"In the sub-order Rhizostomae the edges of the oral opening use together at an early age and leave several…

Scaphites equalis is a species of extinct cephalopods that thrived during the Cretaceous period.

Scaphites

Scaphites equalis is a species of extinct cephalopods that thrived during the Cretaceous period.

Kraken are legendary sea monsters of gargantuan size, said to have dwelt off the coasts of Norway and Iceland. Kraken is the definite article form of krake, a Scandinavian word designating an unhealthy animal, or something twisted. Pen and wash drawing by malacologist Pierre D&eacute;nys de Montfort, 1801, from the descriptions of French sailors reportedly attacked by such a creature off the coast of Angola.

Kraken Sea Monster

Kraken are legendary sea monsters of gargantuan size, said to have dwelt off the coasts of Norway and…

"Cuttlefish are probably the most interesting animals of [the cephalopoda] order. They live for five or six years, and lay eggs, which are large and generally found in clusters, and are known to fishermen as sea-grapes."

Sepia Officinalis (Linnaeus)

"Cuttlefish are probably the most interesting animals of [the cephalopoda] order. They live for five…

An upclose view of the arm of a Sepia Tuberculosa.

Arm of Sepia Tuberculosa (Lamarck)

An upclose view of the arm of a Sepia Tuberculosa.

"Of this there are several species in the Atlantic, Indian, and Pacific Oceans. They are two to four inches long." &mdash; Goodrich, 1859

Sepiola

"Of this there are several species in the Atlantic, Indian, and Pacific Oceans. They are two to four…

Following the species of simple septa and straight shells, came the Trocholites ammoulus, of simple septa and coiled chambered shells of the Trenton period.

Coiled Chambered Shell

Following the species of simple septa and straight shells, came the Trocholites ammoulus, of simple…

The Clymenia Sedgwickii represents a coiled shell with angulated or bent septa.

Coiled Chambered Shell

The Clymenia Sedgwickii represents a coiled shell with angulated or bent septa.

Goniatites are extinct ammonoids, shelled cephalopods related to squid, octopus, and belemnites, that form the order Goniatitida. The goniatites all possessed an external shell, which is divided internally into chambers. The animal lived in the largest of the external chambers, and the internal chambers would have been filled with gas, making the animal buoyant in the water.

Coiled Chambered Shell

Goniatites are extinct ammonoids, shelled cephalopods related to squid, octopus, and belemnites, that…

Chambered shell, endless in their variations, in the earliest periods were a species with simple septa and straight shells as in Ormoceras tenuifilum, which shows a large annulated central siphon.

Straight Chambered Shell

Chambered shell, endless in their variations, in the earliest periods were a species with simple septa…