Jellyfish (also jellies or sea jellies) are free-swimming members of the phylum Cnidaria Cnidaria is a phylum containing over 9,000 species of animals found exclusively in aquatic, mostly marine, environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are. Jellyfish have several different morphologies that represent several different cnidarian classes including the Scyphozoa Scyphozoans are members of the phylum Cnidaria and are referred to as the "true jellyfish." Scyphozoans range from the Ediacarian time period through the Recent. In Scyphozoans, the medusa form is dominant life stage, while the polyp form may be a juvenile stage. As medusae, they eat a variety of crustaceans and fish, which they capture (over 200 species), Staurozoa Stauromedusae, or the stalked jellyfishes, is an order of jellyfish within the phylum Cnidaria. They are unique in that they do not enter the medusa stage, instead remaining polyps throughout their lives. After the larvae crawl across the sea floor and find a suitable place, they attach themselves typically to rock or algae to develop. Unlike most (about 50 species), Cubozoa Box jellyfish are invertebrates belonging to the class Cubozoa, named for their cube-shaped medusae. Cubozoans are categorized separately from other types of jellyfish and are considered more complex than Scyphozoans. Likewise, Chironex fleckeri , the best-known species of box jellyfish, is only one of a category which actually contains about 19 (about 20 species), and Hydrozoa Hydrozoa 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 (about 1000-1500 species that make jellyfish and many more that do not)[1][2]. The jellyfish in these groups are also called, respectively, scyphomedusae Jellyfish are free-swimming members of the phylum Cnidaria. They have several different morphologies that represent several different cnidarian classes including the Scyphozoa (over 200 species), Staurozoa (about 50 species), Cubozoa (about 20 species), and Hydrozoa (about 1000-1500 species that make jellyfish and many more that do not). The, stauromedusae Stauromedusae, or the stalked jellyfishes, is an order of jellyfish within the phylum Cnidaria. They are unique in that they do not enter the medusa stage, instead remaining polyps throughout their lives. After the larvae crawl across the sea floor and find a suitable place, they attach themselves typically to rock or algae to develop. Unlike most, cubomedusae, and hydromedusae Anthomedusae or Anthomedusa, the athecate hydroids, are an order of the Hydrozoa, a class of marine invertebrates belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily discussed and spectactular group - it has also been called Gymnoblastea, or, with or without an emended ending "-ae&; medusa In biology, a medusa is a form of cnidarian in which the body is shortened on its principal axis and broadened, sometimes greatly, in contrast with polyps. 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 is another word for jellyfish, but it also refers specifically to the adult stage of the life cycle.
Jellyfish are found in every ocean, from the surface to the deep sea. Some hydrozoan jellyfish, or hydromedusae, are also found in fresh water and are less than half an inch in size. They are partially white and clear and do not sting. Many of the best-known jellyfish, such as Aurelia, are scyphomedusae Jellyfish are free-swimming members of the phylum Cnidaria. They have several different morphologies that represent several different cnidarian classes including the Scyphozoa (over 200 species), Staurozoa (about 50 species), Cubozoa (about 20 species), and Hydrozoa (about 1000-1500 species that make jellyfish and many more that do not). The. These are the large, often colorful, jellyfish that are common in coastal zones worldwide.
In its broadest sense, the term jellyfish also generally refers to members of the phylum Ctenophora The Ctenophora , commonly known as comb jellies, are a phylum of animals that live in marine waters worldwide. Their most distinctive feature is the "combs", groups of cilia that they use for swimming, and they are the largest animals that swim by means of cilia — adults of various species range from a few millimeters to 1.5 meters (59. Although not closely related to cnidarian jellyfish, ctenophores are also free-swimming planktonic carnivores, are generally transparent or translucent, and exist in shallow to deep portions of all the world's oceans.
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Townsville Bulletin
THE stinging of 10-year-old Rachel Shardlow by a box jellyfish 23km upstream from the mouth of the Calliope River inland from Gladstone has created a lot of ...
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Aliens Last night we went to a preview for James Cameron s new movie Aliens of the Deep It was pretty spectacular in 3 D Imax all shot on the bottom of the ocean with extraordinary critters and
