The Corals and Sea Anemone ClipArt gallery provides 241 images of corals and sea anemone in the phylum cnidaria. They attach themselves to the bottom using an adhesive 'foot', called a basal disc.

A Radiate Polyp coral, Dendrophyllia.

Polyp

A Radiate Polyp coral, Dendrophyllia.

An individual coral is known as a polyp. They resemble sea anemone, as they have tubular bodies with tentacles. This is a cluster of New England coral polyps.

Coral Polyp

An individual coral is known as a polyp. They resemble sea anemone, as they have tubular bodies with…

An individual coral is known as a polyp. They resemble sea anemone, as they have tubular bodies with tentacles. This is a cluster of red coral polyps.

Coral Polyp

An individual coral is known as a polyp. They resemble sea anemone, as they have tubular bodies with…

A Radiate Polyp, an Actinia.

Radiate Polyp

A Radiate Polyp, an Actinia.

Vertical section through a polyp. Mouth surrounded by tentacles and beneath it the "stomatodaeum."

Vertical Section Through a Polyp

Vertical section through a polyp. Mouth surrounded by tentacles and beneath it the "stomatodaeum."

"The polyp of the <em>Porites</em> is an animal somewhat pitcher-shaped, with twelve short tentacula, having unequal polygonal cells, imperfectly defined, slightly radiating by thread-like, pointed rays. Externally it presents the figure of an irregular trelliswork, more or less loosely connected in its meshes."

Porites Furcata (Lamarck)

"The polyp of the Porites is an animal somewhat pitcher-shaped, with twelve short tentacula,…

"The colonies of these singular creatues are in the form of a cartilaginous tube, open at one end. In the walls fo this tube, formed by the coalescence of the mantles of the animals composing it, the bodies of the Ascidians are seperately imbedded, the branchial chamber of each passing completely through the wall from its outer to its innner surface." &mdash; Goodrich, 1859

Pyrosoma

"The colonies of these singular creatues are in the form of a cartilaginous tube, open at one end. In…

"It is to this family more especially that the formation of the coral reeds is to be attributed. In this the corals usually form thick stony masses; the stony rays of the cells are exceedingly numerous, and the cels themselves penetrate deeply into the mass of coral, although they are generally partially divided by imperfect transverse paritions." &mdash; Goodrich, 1859

Astraea rotulosa

"It is to this family more especially that the formation of the coral reeds is to be attributed. In…

"Diagram of Salpa africana. o.a., Oral aperture; d.t., dorsal tubercle; te., tentacle; g., ganglion; m., muscle bands; atr., atrium; b.v., blood-vessel; an., anus; a.a., exhalant aperture; v.n., visceral nucleus; h., heart st., stolon; d.l., dorsal lamina; E., endostyle; s.n.g., sub-neural gland; ph., pharynx; p.p.b., peri-pharyngeal band." -Thomson, 1916

Salpa Africana

"Diagram of Salpa africana. o.a., Oral aperture; d.t., dorsal tubercle; te., tentacle; g., ganglion;…

"Medusiform person (Sarsia), one of the Anthomedusae, detached from a hydroid colony of the family Corynidae. b, the long manubrium, bearing (as an exception) medusiform buds; a, mouth." &mdash; Encyclopedia Britannica, 1893

Sarsia

"Medusiform person (Sarsia), one of the Anthomedusae, detached from a hydroid colony of the family Corynidae.…

Edwardsia beautempsi is a species of sea anemone that lives freely in tubes in the sand, unattached.

Sea Anemone

Edwardsia beautempsi is a species of sea anemone that lives freely in tubes in the sand, unattached.

An illustration of a sea anemone opened (left) and closed (right).

Sea Anemone

An illustration of a sea anemone opened (left) and closed (right).

An perpendicular section of a sea anemone. Sea anemones are a group of water dwelling, predatory animals of the order Actiniaria; they are named after the anemone, a terrestrial flower. As cnidarians, sea anemones are closely related to corals, jellyfish, tube-dwelling anemones, and Hydra.

Perpendicular Section of a Sea Anemone

An perpendicular section of a sea anemone. Sea anemones are a group of water dwelling, predatory animals…

Agarum Turneri, Sea Colander, so called from the perforations with which the frond, as it grows, becomes riddled.

Sea Colander

Agarum Turneri, Sea Colander, so called from the perforations with which the frond, as it grows, becomes…

"The <em>Fan Gorgon</>, from the Antilles; it often attains a height of eighteen or twenty inches. The resemblance of its network to fine lace gives rise to its name of <em>Sea-Fan</em>."

Magnified Portion of Fan Gorgon

"The Fan Gorgon, from the Antilles; it often attains a height of eighteen or twenty inches. The

"The <em>Fan Gorgon</>, from the Antilles; it often attains a height of eighteen or twenty inches. The resemblance of its network to fine lace gives rise to its name of <em>Sea-Fan</em>."

Gorgonia Flabellum

"The Fan Gorgon, from the Antilles; it often attains a height of eighteen or twenty inches. The

"The <em>Fan Gorgon</>, from the Antilles; it often attains a height of eighteen or twenty inches. The resemblance of its network to fine lace gives rise to its name of <em>Sea-Fan</em>. The Whorled Gorgon, which is found in the Mediterranean, is of elegant form."

Gorgonia Verticellata

"The Fan Gorgon, from the Antilles; it often attains a height of eighteen or twenty inches. The

"The <em>Fan Gorgon</>, from the Antilles; it often attains a height of eighteen or twenty inches. The resemblance of its network to fine lace gives rise to its name of <em>Sea-Fan</em>. The Whorled Gorgon, which is found in the Mediterranean, is of elegant form."

Magnified Portion of Gorgonia Verticellata

"The Fan Gorgon, from the Antilles; it often attains a height of eighteen or twenty inches. The

The Sea Pansy (Renilla reniformis) is a sea pen in the Renillidae family. Shown here with a single polypite, the sea pansy is common to Florida beaches.

Sea Pansy

The Sea Pansy (Renilla reniformis) is a sea pen in the Renillidae family. Shown here with a single polypite,…

"These winged species of polypidom are somewhat scythe-shaped, well developed, and furnished with a great quantity of pointed spiculae, which are constituted of bundles at the base of the calyx of each polyp. This figure shows one which inhabits the Mediterranean Sea."

Pennatula Spinosa

"These winged species of polypidom are somewhat scythe-shaped, well developed, and furnished with a…

The prehistoric chordate, the Ascidian or sea squirt.

Sea Squirt

The prehistoric chordate, the Ascidian or sea squirt.

"Gastrulation of an Ascidian. I. Vesicular Morula of an Ascidian flattened and about to undergo gastrulation. II. Gastrulation effected. fh, cavity of the morula, or blasto-invagination; ch, dd, large blastomeres of the hypoblast, inclosed in small blastomeres of the epiblast." -Whitney, 1911

Sea Squirt Gastrulation

"Gastrulation of an Ascidian. I. Vesicular Morula of an Ascidian flattened and about to undergo gastrulation.…

The sea-anemones are mostly found between tide-marks in rock-pools, or on ledges of stone, adhereing to solid objects by means of the sucker-like base.

Sea-anemone

The sea-anemones are mostly found between tide-marks in rock-pools, or on ledges of stone, adhereing…

"Their tentacles, which are disposed in regular circles, and tinged with a variety of bright lively colors, very nearly represent the beautiful petals of some f the most elegantly fringed and radiated flowers, such as the carnation, marygold, and anemone. They are of various sizes, from that of the smallest thimble to the largest apple; and have considerable power of locomotion, being able not only to move along upon the base, but also in a reversed position upon their entacles." &mdash; Goodrich, 1859

Sea-anemone

"Their tentacles, which are disposed in regular circles, and tinged with a variety of bright lively…

This is a diagram of the sea-anemone, illustrating another type of radial symmetry. A, cross section; B, longitudinal section. c, the chamber between the mesenteries (m).

Sea-Anemone

This is a diagram of the sea-anemone, illustrating another type of radial symmetry. A, cross section;…

"Their tentacles, which are disposed in regular circles, and tinged with a variety of bright lively colors, very nearly represent the beautiful petals of some f the most elegantly fringed and radiated flowers, such as the carnation, marygold, and anemone. They are of various sizes, from that of the smallest thimble to the largest apple; and have considerable power of locomotion, being able not only to move along upon the base, but also in a reversed position upon their entacles." &mdash; Goodrich, 1859

Mouth of the sea-anemone

"Their tentacles, which are disposed in regular circles, and tinged with a variety of bright lively…

"In the family of the Gorgonidae the substance of the polypidom is collected into a solid central axis, covered by the fleshy mass in which the polypes are imbedded. The axis is cometimes calcareous, sometimes horny; in certain casees it is formed of a series of joints united by horny rings. Many species grow in a more or less aborescent form, of which the <em>Sea-Fans</em> are an example." &mdash; Goodrich, 1859

Sea-fan

"In the family of the Gorgonidae the substance of the polypidom is collected into a solid central axis,…

"The Sea-fan (<em>gorgonia cavolinii</em>)." &mdash;Encyclopedia Britannica, 1910

Sea-fan

"The Sea-fan (gorgonia cavolinii)." —Encyclopedia Britannica, 1910

"The sea-fan (Gorgonia cavolinii)." &mdash; The Encyclopedia Britannica, 1910

Sea-fan

"The sea-fan (Gorgonia cavolinii)." — The Encyclopedia Britannica, 1910

The Sea-Fir (Sertularia tubitheca) is mistaken as a plant but is actual a hydrozoan animal of the phylum Cnidaria.

Sea-Fir

The Sea-Fir (Sertularia tubitheca) is mistaken as a plant but is actual a hydrozoan animal of the phylum…

"The main stem of the polypidom of these animals is fleshy, but is furnished with an internal bony axis, which, however, does not reach to either exlamellae, which stand out upon each side of stalk, giving the whole polypidom, in some cases, the appearance of a large quill-feather. Of this the Sea-Pen, <I>Pennatula grisea</em>, is a familiar example. There are, however, many other forms." &mdash; Goodrich, 1859

Sea-pen

"The main stem of the polypidom of these animals is fleshy, but is furnished with an internal bony axis,…

"Diagram showing possible modifications of medusiform and hydriform persons of a colony of Siphonophora. n, pneumatocyst; k, nectocalyces (swimming bells); l, hydrophyllium (covering-piece); i, generative medusiform person; g, dactylozooid with attached tentacle, h; e, nutritive hydriform person, with branched grappling tentacle, f; m, stem. The thick black line represents endoderm, the thinner line ectoderm." &mdash; Encyclopedia Britannica, 1893

Siphonophora

"Diagram showing possible modifications of medusiform and hydriform persons of a colony of Siphonophora.…

"Floating colonies of Siphonophora. A, Diphyes campanulata. B, A group of appendages from the stem of the same Diphyes. C, Physophora hydrostatica. D, Seperate nectocalyx of the same. E, Cluster of female sporosacs (aborted medusae) of Agalma sarsii. a, stem or axis of the colony; a', pneumatocyst (air-bladder); m, nectocalyx; c, sub-umbrellar cavity of nectocalyx; v, radiating canals of the umbrella of the nectocalyx; o, orifice formed by the margin of the umbrella; t, hydrophyilia in B, dactylozooids in C; n, stomach; i, tentacles; g, sporosacs." &mdash; Encyclopedia Britannica, 1893

Siphonophora

"Floating colonies of Siphonophora. A, Diphyes campanulata. B, A group of appendages from the stem of…

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella; g, entric cavity. In A an invagination of the ectoderm, which is more complete in B, represents the rudiment of the sub-umbrella space." &mdash; Encyclopedia Britannica, 1893

Sporosac

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella;…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Medualform person still attached by a stalk at the aboral pole to a colony." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Modified medusiform person, with margin of the disc (umbrella) united above and importforato (mouthless) manubrium." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac, with imcomplete extension of the enteric cavity into the umbrella,-rudimentary invagination above to form the sub-umbrella cavity." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac with manubrial portion only of the enteric cavity." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac without any trace of manubrium." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Diagrams illustrating the successive stages in the development of the cyclosystems of the Stylasteridae. 1, Sporadopora dichotoma. 2, 3, Allopora nobilis. 4, Allopora profunda. 5, Allopora miniacea. 6, Astylus subviridis. 7, Distichopora coccinea. s, style; dp, dactylopore; gp, gastropore; b, in 6, inner horseshoe-shaped mouth of gastropore." &mdash; Encyclopedia Britannica, 1893

Stylasteridae

"Diagrams illustrating the successive stages in the development of the cyclosystems of the Stylasteridae.…

"A, Schematic longitudinal section through a zooid and bud of Stylophora digitata. In A, B, and C the thick black lines represent coenosarc; col, columella; T, tabulae. B, similar section through a single zoooid and bud of Astroides calicularis. C, similar section through three corallites of Lophohelia prolifera. ez, edge-zone. D, Diagram illustration the process of budding by unequal division. E, section through a dividing calicle of Mussa, showing the union of two septa in the plane of division, and the origin of new septa at right angles to them." &mdash; The Encyclopedia Britannica, 1910

Stylophora Digitata

"A, Schematic longitudinal section through a zooid and bud of Stylophora digitata. In A, B, and C the…

"Hydriform person of Syncoryne, with medusiform persons budding from it, and shown in various stages of development, a, b, c, d, e." &mdash; Encyclopedia Britannica, 1893

Syncoryne

"Hydriform person of Syncoryne, with medusiform persons budding from it, and shown in various stages…

"1, Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense cell; 2, a cnidoblast with enclosed nematocyst from the same specimen; 3 and 4, two forms of gland cell from the stomodaeum; 5a, 5b, epithelio-muscular cells from the tentacle in different states of contraction; 5c, an epithelio-muscular cell from the endoderm, containing a symbiotic zooxanthella ; 6, a ganglion cell fro mthe ectoderm of the peristome." &mdash;Encyclopedia Britannica, 1910

Tentacles

"1, Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense…

"Simple tentaculocyst of one of the Trachomedusae (Rhopalonema velatum). The process carrying the otolith or concretion hk, formed by endoderm cells, is enclosed by an upgrowth forming the "vesicle," which is not yet quite closed in at the top." &mdash; Encyclopedia Britannica, 1893

Trachomedusae

"Simple tentaculocyst of one of the Trachomedusae (Rhopalonema velatum). The process carrying the otolith…

"These animals are generally called <em>Tree-corals</em>, on account of the forms of the polypidons which they build and in which they live. They are very small, and possess twelve short tentacles placed in a circle around the mouth; they occupy the cells in the polypidom, which is of a porus nature, the openings of the cells being placed at the summits of tubercular prominences of greater or lesser elevations. " &mdash; Goodrich, 1859

Tree-coral

"These animals are generally called Tree-corals, on account of the forms of the polypidons…

"The <em>Tubipora</em> is a calcareous coral, formed by the combination of distinct, regularly arranged tubes, connected together at regular distances by lamellar expansions of the same material. The aggregate formation resulting from the combination of tubes constitutes a variously shaped mass, which often attains a very considerable size."

Tubipora Musica

"The Tubipora is a calcareous coral, formed by the combination of distinct, regularly arranged…

"The <em>Tubipora</em> is a calcareous coral, formed by the combination of distinct, regularly arranged tubes, connected together at regular distances by lamellar expansions of the same material." This figure shows the crown of delicately fringed tentacula of a individual polyp.

Crown of Delicately Fringed Tentacula of Tubipora Musica

"The Tubipora is a calcareous coral, formed by the combination of distinct, regularly arranged…

"The <em>Tubipora</em> is a calcareous coral, formed by the combination of distinct, regularly arranged tubes, connected together at regular distances by lamellar expansions of the same material. The aggregate formation resulting from the combination of tubes constitutes a variously shaped mass, which often attains a very considerable size."

Magnified Portion of Tubipora Musica

"The Tubipora is a calcareous coral, formed by the combination of distinct, regularly arranged…

"The <em>Tubipora</em> is a calcareous coral, formed by the combination of distinct, regularly arranged tubes, connected together at regular distances by lamellar expansions of the same material." This figure shows a close-up of the polyp.

Polyp of Tubipora Musica

"The Tubipora is a calcareous coral, formed by the combination of distinct, regularly arranged…

"The <em>Tubipora</em> is a calcareous coral, formed by the combination of distinct, regularly arranged tubes, connected together at regular distances by lamellar expansions of the same material." This figure shows the polyp, which occupies the summit of the tube, and which forms this curious coral.

Tube and Polyp of Tubipora Musica

"The Tubipora is a calcareous coral, formed by the combination of distinct, regularly arranged…

"A. Skeleton of a young colony of Eubipora purpurea. st, Stolon; p, platform. B. Diagrammatic longitudinal section of a corallite, showing two platforms, p, and simple and cup-shaped tabulae, t." &mdash; The Encyclopedia Britannica, 1910

Tubipora Purpurea

"A. Skeleton of a young colony of Eubipora purpurea. st, Stolon; p, platform. B. Diagrammatic longitudinal…

"A Skeleton of a young colony of <em>Tubipora purpurea</em>. st, stolon; p, platform. B, Diagrammatic longitudinal section of a corallite, showing two platforms, p, and simple and cup-shaped tabulae, t." &mdash;Encyclopedia Britannica, 1910

Colony of Tubipora Purpurea

"A Skeleton of a young colony of Tubipora purpurea. st, stolon; p, platform. B, Diagrammatic…

"A single hydriform person a bearing a stalk carrying numerous degenerate medusiform persons or sporosacs b." &mdash; Encyclopedia Britannica, 1893

Tubularia Indivisa

"A single hydriform person a bearing a stalk carrying numerous degenerate medusiform persons or sporosacs…

Diagram of a longitudinal section through a tunicate or ascidian (sea squirt).

Tunicate

Diagram of a longitudinal section through a tunicate or ascidian (sea squirt).

"The <em>Umbellularia Groenlandica</em> has a very long stem, which is terminated at the summit only by a cluster of polyps. It is an inhabitant of the northern seas."

Umbellularia Groenlandica (Lamarck)

"The Umbellularia Groenlandica has a very long stem, which is terminated at the summit only…

"The species shown in this figure has a simple, cylindrical body, without branchiae, and a rudimentary polypidom furnished with very large polyps of a whitish color."

Veretillum Cynomorium (Lamarck)

"The species shown in this figure has a simple, cylindrical body, without branchiae, and a rudimentary…

"A, Zoanthid colony, showing the expanded zooids. B, Diagram showing the arrangement of mesenteries in a young Zoanthid. C, Diagram showing the arrangement of mesenteries in an adult Zoanthid. 1, 2, 3, 4, Edwardsian mesenteries." &mdash; The Encyclopedia Britannica, 1910

Zoanthid Colony

"A, Zoanthid colony, showing the expanded zooids. B, Diagram showing the arrangement of mesenteries…

"Single zooid with the adjacent soft tissues as seen after removal of the exoskeleton by decalcification. Z1, the distal, and Z2, the proximal of intracalicular portion of the zooid; ec, ectoderm; ct, coenenchymal tubes; sp, superficial network of solenia." &mdash;Encyclopedia Britannica, 1910

Zooid

"Single zooid with the adjacent soft tissues as seen after removal of the exoskeleton by decalcification.…

"An expanded Alcyonarian Zooid, showing the mouth surrounded by eight pinnate tentacles. st, Stomodaeum in the center of the transparent body; m, mesenteries; asm, asulcar mesenteries; B, picules, enlarged." &mdash;Encyclopedia Britannica, 1910

Alcyonarian zooid

"An expanded Alcyonarian Zooid, showing the mouth surrounded by eight pinnate tentacles. st, Stomodaeum…

"Transverse section of an Alcyonarian zooid. mm, mesenteries; mb, muscle banners; sc, sulcus; st, stomodaeum." &mdash;Encyclopedia Britannica, 1910

Alcyonarian Zooid

"Transverse section of an Alcyonarian zooid. mm, mesenteries; mb, muscle banners; sc, sulcus; st, stomodaeum."…