This gallery includes 82 line drawings of jellyfish. Jellyfish are in the phylum cnidaria, and are free-swimming creatures that are also called medusa.

"One of the Acalephae; a name given to a large number of marine animals; and redpresenyted chiefly by medusidae."-Whitney, 1902

Acaleph

"One of the Acalephae; a name given to a large number of marine animals; and redpresenyted chiefly by…

"The under surface, showing the mouth in the center, surrounded by the tentacula, and overial chambers exterior to the origins of these." — Chambers' Encyclopedia, 1875

Acalephae

"The under surface, showing the mouth in the center, surrounded by the tentacula, and overial chambers…

"Side-view, showing the tentacula hanging down in their natural position." — Chambers' Encyclopedia, 1875

Acalephae

"Side-view, showing the tentacula hanging down in their natural position." — Chambers' Encyclopedia,…

"Gonoblastidium of Athorybia rosacea, bearing three hydroclysts, a, a gynophore, b, and two androphores, c." -Whitney, 1911

Athorybia Gonoblastidium

"Gonoblastidium of Athorybia rosacea, bearing three hydroclysts, a, a gynophore, b, and two androphores,…

"B, male gonophore of Athorybia rosacea." -Whitney, 1911

Athorybia Gonophore

"B, male gonophore of Athorybia rosacea." -Whitney, 1911

"A, female gonophores of Athorybia rosacea on their common stem or gynophore: a, ovum; b, radial canals." -Whitney, 1911

Athorybia Gonophores

"A, female gonophores of Athorybia rosacea on their common stem or gynophore: a, ovum; b, radial canals."…

"C, female gonophores: a, genital vesicle; b, vitellus; c, radial canals." -Whitney, 1911

Athorybia Gonophores

"C, female gonophores: a, genital vesicle; b, vitellus; c, radial canals." -Whitney, 1911

"D, female gonophores, enlarged: c, radial canals; d, canal of manubrial cavity." -Whitney, 1911

Athorybia Gonophores

"D, female gonophores, enlarged: c, radial canals; d, canal of manubrial cavity." -Whitney, 1911

Auditory and equilibrative organs of jellyfishes. A, of Cunarcha. B, of Pectis. C, of Rhopalonema. D, of Cumarina. Labels: Ok, auditory tentacle; Ol, Otolith; Oh, auditory hairs; n, nerves.

Auditory Organs of the Jellyfish

Auditory and equilibrative organs of jellyfishes. A, of Cunarcha. B, of Pectis. C, of Rhopalonema. D,…

"Surface view of Aurelia. Showing four genital pockets in centre, much branched radial canals, eight peripheral niches for sense organs, and peripheral tentacles." -Thomson, 1916

Aurelia

"Surface view of Aurelia. Showing four genital pockets in centre, much branched radial canals, eight…

"Vertical section of Aurelia. m., Mouth; st., stomach; r.c., radial canal; R., reproductive organs; g.f., gastric filaments; g.p., sub-genital cavity; l., marginal tentacle; s., sense organ; the shaded part is mesogloea." -Thomson, 1916

Aurelia

"Vertical section of Aurelia. m., Mouth; st., stomach; r.c., radial canal; R., reproductive organs;…

"One of the commonest species, and must have been observed by those who frequent the sea-shore. In the water the creature swims along most gracefully by the contractoin and dilatation of its transparent disk." — Goodrich, 1859

Medusa, aurita

"One of the commonest species, and must have been observed by those who frequent the sea-shore. In the…

"a, tentacula; b, mouth; c, termination of intestine." — Chambers' Encyclopedia, 1875

Beroe

"a, tentacula; b, mouth; c, termination of intestine." — Chambers' Encyclopedia, 1875

An illustration of a beroe.

Beroe

An illustration of a beroe.

"Bougainvillea ramosa. A, entire colony, natural size; B, portion of the same magnified; C, immature medusa; cir. c, circular canal; cu, cuticle or perisarc; ent. cav, enteric cavity; hyd. polype or hydranth; hyp, hypostome or manubrium; med, medusa; mnb, manubrium; rad. c, radial canal; t, tentacle; v, velum." -Parker, 1900

Bougainvillea Ramosa

"Bougainvillea ramosa. A, entire colony, natural size; B, portion of the same magnified; C, immature…

"Which is without a central peduncle, yet has numerous long appendages hanging from its border." — Goodrich, 1859

Cuvieria carisochroma

"Which is without a central peduncle, yet has numerous long appendages hanging from its border." —…

"Carmarina (Geryonia) hastata, one of the Trachomedusae. a, nerve-ring; a', radial nerve; b, tentaculocyst; c, circular canal; e, radiating canal; g'', ovary; h, perenia or cartilaginous process ascending from the cartilaginous margin of the disc centripetally in the outer surface of the jelly-like disc; six of these are perradial, six interradial, coresponding to the twelve solid larval tentacles, resembling those of Cunina; k, dilatation (stomach) of the manubrium; l, jelly of the disc; p, manubrium; t, tentacle (hollow and tertiary, i.e., preceded by six perradial and six interradial solid larval tentacles); u, cartilaginous margin of the disc covered by thread-cells; v, velum." — Encyclopedia Britannica, 1893

Carmarina

"Carmarina (Geryonia) hastata, one of the Trachomedusae. a, nerve-ring; a', radial nerve; b, tentaculocyst;…

An illustration of a cestus.

Cestus

An illustration of a cestus.

"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." — Encyclopedia Britannica, 1893

Chrysaora

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

"Diagram of a Ctenophore. M., Mouth; S., sensory organ; T., tentacle cut short; SH., pouch of tentacle; C., ciliated combs; F., funnel or central canal; SV., paragastric canal running parallel with stomodaeum; G., other canals of the gut; V., one of the meridional canals, bearing gonads, running under the bands of ciliated combs." -Thomson, 1916

Ctenophore

"Diagram of a Ctenophore. M., Mouth; S., sensory organ; T., tentacle cut short; SH., pouch of tentacle;…

The phylum Ctenophora , commonly known as comb jellies, is a phylum that includes the sea gooseberry (Pleurobrachia pileus) and Venus' girdle (Cestum veneris). Classically grouped with Cnidaria (jellyfish) in the Coelenterata infrakingdom, ctenophores have recently been identified as the most basal known lineage of animals.

Ctenopore

The phylum Ctenophora , commonly known as comb jellies, is a phylum that includes the sea gooseberry…

The phylum Ctenophora , commonly known as comb jellies, is a phylum that includes the sea gooseberry (Pleurobrachia pileus) and Venus' girdle (Cestum veneris). Classically grouped with Cnidaria (jellyfish) in the Coelenterata infrakingdom, ctenophores have recently been identified as the most basal known lineage of animals.

Transverse Section of Ctenopore

The phylum Ctenophora , commonly known as comb jellies, is a phylum that includes the sea gooseberry…

"The <em>Rhisostoma Cuvieri</em>, a British species, measures two feet, or ever more, in diameter, while some fo the inhabitants of tropical seas are said to attain a still larger size. In calm weather they often swim close to the surface of the sea, in such multitudes as to impede the motion of a boat through the water. Such a fleet as this, seen with the sun shining strongly upon them, is a magnificent specacle, from the beautiful iridescemce with which the sunlight is reflected to the eye of the beholder. With the approach of night this scene of beauty only gives place to another, for these Medusae are exceedingly luminous in the dark." &mdash; Goodrich, 1859

Rhizostoma cuvieri

"The Rhisostoma Cuvieri, a British species, measures two feet, or ever more, in diameter, while…

"The <em>Cydippe</em>, formerly called <em>Beroe Pileus</em>, is noe referred to this family, it has a globular body, with two long ciliated appendages." &mdash; Goodrich, 18591`

Cydippe

"The Cydippe, formerly called Beroe Pileus, is noe referred to this family, it has…

A schematic drawing of a cydippid.

Schematic Drawing of a Cydippid

A schematic drawing of a cydippid.

A schematic drawing of a cydippid.

Schematic Drawing of a Cydippid

A schematic drawing of a cydippid.

Eucope diaphana is a species of marine animal in the order Anthomedusae.

Eucope

Eucope diaphana is a species of marine animal in the order Anthomedusae.

"Stages in the development of two zoophytes; I-M, fixation of the planula and development of the hydrula." -Parker, 1900

Eudendrium

"Stages in the development of two zoophytes; I-M, fixation of the planula and development of the hydrula."…

An illustration of Eudendruim ramonsum.  The Idrozoi are a class of the phylum of Cnidarians, and in many ways be considered the most primitive Cnidarians.

Eudendrium

An illustration of Eudendruim ramonsum. The Idrozoi are a class of the phylum of Cnidarians, and in…

Eudendrium cochleatum is a hydrozoan marine animal in the Eudendriidae family.

Eudendrium

Eudendrium cochleatum is a hydrozoan marine animal in the Eudendriidae family.

The simple eye of a jellyfish

Eye

The simple eye of a jellyfish

an organism having many stinging arms.

Jelly Fish

an organism having many stinging arms.

"The most singular of the <em>Callianiridae</em> is the Venus' Girdle, <em>Celestum Veneris</em>, which inhabits the Mediterranean, and which at first sight would be taken for any thing rather than a near relation of the globular <em>Cydippe</em>. In this curious creature the sides of the body are produced into a long ribbon, which sometimes attains the length of four or five feet; the mouth and digestive organs being, however, confined to their original position in the middle of he body." &mdash; Goodrich, 1859

Venus' girdle

"The most singular of the Callianiridae is the Venus' Girdle, Celestum Veneris, which…

"Hormiphora (Cydippe) plumosa. A, from the side; B, from the aboral pole. mth, mouth; s. pl, swimming plates; t and b, tentacles." -Parker, 1900

Hormiphora Plumosa

"Hormiphora (Cydippe) plumosa. A, from the side; B, from the aboral pole. mth, mouth; s. pl, swimming…

Hydra are in the Jellyfish family, class Hydrozoa.

Hydra

Hydra are in the Jellyfish family, class Hydrozoa.

Hydra are in the Jellyfish family, class Hydrozoa. Cross-section of the body showing the two layers of cells of the body wall.

Hydra

Hydra are in the Jellyfish family, class Hydrozoa. Cross-section of the body showing the two layers…

If undisturbed, the body and tentacles may occasionally sway gently. If disturbed, a hydra usually shortens until it is a tiny ball.

Hydra

If undisturbed, the body and tentacles may occasionally sway gently. If disturbed, a hydra usually shortens…

"The <em>Hydra Viridis</em> is another freshwater polyp, common to ponds and still waters Sometimes the green hydra inhabits brooks filled with herbage." This image shows the Hydra bearing an embryo ready to detach itself.

Hydra Viridis

"The Hydra Viridis is another freshwater polyp, common to ponds and still waters Sometimes…

"The <em>Hydra Vulgaris</em> inhabits stagnant ponds and slow running waters."

Hydra Vulgaris

"The Hydra Vulgaris inhabits stagnant ponds and slow running waters."

"Hydroctena. A medusoid with suggestion of Ctenophore structure, but a true medusoid nonetheless. ab.o. Aboral sensory organ; T., retractile tentacle; v., velum; M., mouth; ST., stomach" -Thomson, 1916

Hydroctena

"Hydroctena. A medusoid with suggestion of Ctenophore structure, but a true medusoid nonetheless. ab.o.…

Colonial, plant-like animals closely related to jellyfish, with stinging cells, Any member of the invertebrate order Hydroida (class Hydrozoa, phylum Cnidaria). Hydroids have three basic life-cycle stages: (1) a tiny free-swimming planula larva about 1 mm (0.04 inch) long, which settles and grows into (2) a sessile (attached), usually colonial hydroid stage, which in turn liberates (3) medusa.

Medusa of a Hydroid

Colonial, plant-like animals closely related to jellyfish, with stinging cells, Any member of the invertebrate…

Hydrozoa (hydrozoans) are a taxonomic class of very small, predatory animals which can be solitary or colonial and which mostly live in saltwater. A few genera within this class live in freshwater. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria.

Hydrozoa Encrusting a Small Shell

Hydrozoa (hydrozoans) are a taxonomic class of very small, predatory animals which can be solitary or…

"Hydrozoon is a name given to the great class of the sub-kingdom C&oelig;lenterata, of which hydra is the type. They exhibit a definite histological structure, their tissues having a cellular organization. These tissues are two, an outer or ectoderm, and an inner or endoderm. In most the prey is seized by tentacles surrounding the mouth and furnished with offensive weapons called thread cells, The hydrozoa are all aquatic, and nearly all marine. Their distribution is world-wide. [Pictured] Hydra fusca, with a young bud at b, and a more advanced bud at c."&mdash;(Charles Leonard-Stuart, 1911)

Hydrozoon

"Hydrozoon is a name given to the great class of the sub-kingdom Cœlenterata, of which hydra is…

A free-swimming jellyfish of the Class Scyphozoa.

Jellyfish

A free-swimming jellyfish of the Class Scyphozoa.

Jellyfish are saucer-shaped and can be a foot or more in diameter. They are gelatinous and semitransparent.

Jellyfish

Jellyfish are saucer-shaped and can be a foot or more in diameter. They are gelatinous and semitransparent.

Jellyfish are generally of the hydrozoa family.

Jellyfish

Jellyfish are generally of the hydrozoa family.

A large jellyfish.

Jellyfish

A large jellyfish.

A common jellyfish.

Jellyfish

A common jellyfish.

"Development of young jellyfish. The top one is ready to break away." &mdash;Davison, 1906

Jellyfish

"Development of young jellyfish. The top one is ready to break away." —Davison, 1906

An illustration of a small jellyfish. Jellyfish are free-swimming members of the phylum Cnidaria. ellyfish don't have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems. They digest using the gastrodermal lining of the gastrovascular cavity, where nutrients are absorbed. They do not need a respiratory system since their skin is thin enough that the body is oxygenated by diffusion. They have limited control over movement and mostly free-float, but can use the hydrostatic skeleton of the water pouch to accomplish vertical movement through pulsations of the disc-like body.

Jellyfish

An illustration of a small jellyfish. Jellyfish are free-swimming members of the phylum Cnidaria. ellyfish…

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each tentacle to attach to eelgrass, sea lettuce or various types of algae instead of swimming. They are small bell shaped and hard to see when hanging on to swaying seaweed.

Gonionemus Jellyfish

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each…

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each tentacle to attach to eelgrass, sea lettuce or various types of algae instead of swimming. They are small bell shaped and hard to see when hanging on to swaying seaweed. Enlarged portions of a hydroid colony bearing the mouth and tentalces of this jellyfish are shown here.

Gonionemus Jellyfish

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each…

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each tentacle to attach to eelgrass, sea lettuce or various types of algae instead of swimming. They are small bell shaped and hard to see when hanging on to swaying seaweed. Enlarged portions of a hydroid colony bearing the mouth and tentalces of this jellyfish are shown here.

Gonionemus Jellyfish

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each…

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each tentacle to attach to eelgrass, sea lettuce or various types of algae instead of swimming. They are small bell shaped and hard to see when hanging on to swaying seaweed. This jellyfish diagram illustrates its method of locomotion.

Gonionemus Jellyfish

Gonionemus is a type of hydrozoan related to jellyfish. It uses adhesive discs near the middle of each…

Fresh water Hydra, a jellyfish, is a many celled animal. Shown enlarged 25 times, is the entire animal.

Hydra Jellyfish

Fresh water Hydra, a jellyfish, is a many celled animal. Shown enlarged 25 times, is the entire animal.

Fresh water Hydra, a jellyfish, is a many celled animal. Shown is a Hydra nettle cells.

Hydra Jellyfish

Fresh water Hydra, a jellyfish, is a many celled animal. Shown is a Hydra nettle cells.

Fresh water Hydra, a jellyfish, is a many celled animal. The organs of defence, nettle cells or lasso cells , in the event of disturbance, the sac will discharge coiled thread an barbs into the body of the intruder.

Hydra Jellyfish

Fresh water Hydra, a jellyfish, is a many celled animal. The organs of defence, nettle cells or lasso…

Fresh water Hydra, a jellyfish, is a many celled animal. The organs of defence, nettle cells or lasso cells , in the event of disturbance, the sac will discharge coiled thread an barbs into the body of the intruder.

Hydra Jellyfish

Fresh water Hydra, a jellyfish, is a many celled animal. The organs of defence, nettle cells or lasso…

Hydroids, related to the jellyfish, have three basic life-cycle stages: a tiny free-swimming planula larva, which settles and grows into a sessile attached, usually colonial hydroid stage, which in turn liberates medusae. An enlarged portion of a hydroid colony (Hydractinia) showing the nutritive polyp (a), the defensive polyp (b), and the reproductive polyp.

Hydroid Jellyfish

Hydroids, related to the jellyfish, have three basic life-cycle stages: a tiny free-swimming planula…

"Scyphistoma stage of Cyanaea capillata, showing two ordinary hydrae tubae, between which are two others, a, b, undergoing fission (the strobila stage)." -Whitney, 1911

Lion's Mane Jellyfish

"Scyphistoma stage of Cyanaea capillata, showing two ordinary hydrae tubae, between which are two others,…