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In biology, a medusa (also known as a hydromedusa) is a form of cnidarian in which the body is shortened on its principal axis and broadened, sometimes greatly, in contrast with the hydroid or polyp. Medusae vary from bell-shaped to the shape of a thin disk, scarcely convex above and only slightly concave below. The upper or aboral surface is called the exumbrella and the lower surface is called the subumbrella; the mouth is located on the lower surface, which may be partially closed by a membrane extending inward from the margin (called the velum). The digestive cavity consists of the stomach and radiating canals which extend toward the margin; these canals may be simple or branching, and vary in number from few to many. The margin of the disk bears sensory organs and tentacles. Biology (from Greek βίος λόγος, see below) is the branch of science dealing with the study of life. ...
Classes Cnidaria (silent c - pronounced // from New Latin cnida, fr. ...
Orders Actinulida Capitata Chondrophora Filifera Hydroida Siphonophora Trachylina Organisms that are in Class Hydrozoa come from the Phylum Cnidaria. ...
In zoology, a polyp is one of two forms of individuals found in many species of cnidarians. ...
In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the gastrointestinal tract used to digest food. ...
Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. ...
In the class Hydrozoa medusae are the sexual individuals of many species, alternating in the life cycle with asexual polyps, In Scyphozoa (or jellyfishes proper)the medusa form predominates; Orders Actinulida Capitata Chondrophora Filifera Hydroida Siphonophora Trachylina Organisms that are in Class Hydrozoa come from the Phylum Cnidaria. ...
This article is about jellyfish, the sea creatures. ...
Orders Stauromedusae Coronatae Semaeostomeae Rhizostomae Jellyfish are marine invertebrates belonging to the Scyphozoan class, and in turn the phylum Cnidaria. ...
In the class Cubozoa, the medusa is the predominant form, with polyps /hydroids usually unknown. Except the freshwater jellyfish, these are the only classes in which medusae appear. Orders see text Box jellyfish, also known as sea wasps, are jellyfish-like creatures found in Australia and the Philippines, which can be extremely deadly, with venom in their tentacles. ...
For the village on the Isle of Wight, see Freshwater, Isle of Wight. ...
German biologist Ernst Haeckel popularized medusae through his vivid illustrations, particularly in Kunstformen der Natur. This article or section is in need of attention from an expert on the subject. ...
Wikimedia Commons has media related to: Kunstformen der Natur Kunstformen der Natur (Artforms of Nature) is a book of lithographic prints by German biologist Ernst Haeckel. ...
Haeckel's medusae Discomedusae Image File history File links Download high resolution version (2300x3300, 2099 KB) Wikipedia links on Talk: Because the description below is a Wikimedia Commons description page, the links are to Wikimedia Commons pages also. ...
| Narcomedusae Image File history File links Download high resolution version (2313x3262, 1714 KB) Summary The 16th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Narcomedusae. ...
| Discomedusae Image File history File links Download high resolution version (2332x3280, 1580 KB) Summary The 18th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Discomedusae. ...
| Trachomedusae Image File history File links Download high resolution version (2305x3271, 1840 KB) Summary The 26th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Trachomedusae. ...
| Discomedusae Image File history File links Download high resolution version (2300x3253, 2246 KB) Summary The 28th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Discomedusae. ...
| Leptomedusae Image File history File links Download high resolution version (2342x3321, 1895 KB) Summary The 36th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Leptomedusae. ...
| Peromedusae Image File history File links Download high resolution version (2350x3326, 1464 KB) Summary The 38th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Peromedusae. ...
| Anthomedusae Image File history File links Download high resolution version (2387x3349, 1639 KB) Summary The 46th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Anthomedusae. ...
| Stauromedusae Image File history File links Download high resolution version (2342x3280, 1568 KB) Summary The 48th plate from Ernst Haeckels Kunstformen der Natur Licensing File links The following pages link to this file: Medusa (biology) Stauromedusae User:Ragesoss/Haeckel ...
Families Cleistocarpidae Eleutherocarpidae Kyopodidae Tesseranthidae Stauromedusae, or the stalked jellyfishes, is an order of jellyfish within the Cnidaria phylum that are unique in that they do not enter the medusa stage, instead remaining polyps throughout their lives. ...
| Cubomedusae (modern Cubozoa) Image File history File links Download high resolution version (2328x3294, 1812 KB) Summary The 78th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Cubomedusae. ...
Families see text Jellyfish net enclosure at Ellis Beach, Queensland Box jellyfish are water-dwelling invertebrates belonging to the class Cubozoa, named for their cube-shaped medusae. ...
| Discomedusae Image File history File links Download high resolution version (2337x3289, 1792 KB) Summary The 88th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Discomedusae. ...
| Discomedusae Image File history File links Download high resolution version (2382x3303, 1959 KB) Summary The 98th plate from Ernst Haeckels Kunstformen der Natur (1904), depicting organisms classified as Discomedusae. ...
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