News tagged with jellyfish
Global experts question claims about jellyfish populations
Blooms, or proliferation, of jellyfish have shown a substantial, visible impact on coastal populations clogged nets for fishermen, stinging waters for tourists, even choked intake lines for power plants ...
Feb 01, 2012 |
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Study identifies blood-forming stem cells' growth
Scientists with the new Children's Research Institute at UT Southwestern Medical Center have identified the environment in which blood-forming stem cells survive and thrive within the body, an important step toward increasing ...
Jan 25, 2012 |
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Robojelly gets an upgrade
Engineers at Virginia Polytechnic Institute and State University (VirginiaTech) have developed a robot that mimics the graceful motions of jellyfish so precisely that it has been named Robojelly. Developed ...
Nov 22, 2011 |
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Swimming jellyfish may influence global climate
Swimming jellyfish and other marine animals help mix warm and cold water in the oceans and, by increasing the rate at which heat can travel through the ocean, may influence global climate. The controversial idea was first ...
Nov 01, 2011 |
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Jellyfish replacing fish in over-exploited areas
(PhysOrg.com) -- Over-fished commercial stocks of plankton-eating fish have been replaced in several locations by jellyfish species. This appears to be something of a paradox because fish move quickly and ...
Hunting jellyfish threaten fish stocks
Far from being at the whim of wave and tide, the enigmatic jellyfish has been found by new research to move deliberately in search of food an ability that could threaten the future of other species ...
Jul 22, 2011 |
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Jellyfish blooms shunt food energy from fish to bacteria
A new study by researchers at the Virginia Institute of Marine Science (VIMS) shows that jellyfish are more than a nuisance to bathers and boaters, drastically altering marine food webs by shunting food energy ...
Jun 06, 2011 |
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Spanish resort in jellyfish alert
Authorities in the Spanish tourist hotspot of Benidorm said Friday they have reopened its beaches to tourists after removing more than a tonne of dangerous jellyfish.
May 27, 2011 |
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Jellyfish 'fingerprints'
Annette Govindarajan is fascinated with studying jellyfish, specifically their complex life cycles. That passion was forged years ago after working with hydrozoans, a jelly of the stinging variety.
May 13, 2011 |
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Through unique eyes, box jellyfish look out to the world above the water
Box jellyfish may seem like rather simple creatures, but in fact their visual system is anything but. They've got no fewer than 24 eyes of four different kinds. Now, researchers reporting online on April 28 in Current Bi ...
Apr 28, 2011 |
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Xenacoelomorpha -- a new phylum in the animal kingdom
An international team of scientists including Albert Poustka from the Max Planck Institute for Molecular Genetics in Berlin has discovered that Xenoturbellida and the acoelomorph worms, both simple marine ...
Feb 16, 2011 |
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Neuroscientists find evidence that autistic patients have trouble understanding others' intentions
(PhysOrg.com) -- A study from MIT neuroscientists reveals that high-functioning autistic adults appear to have trouble using theory of mind to make moral judgments in certain situations.
Medicine & Health / Neuroscience
Jan 31, 2011 |
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Krill, jellyfish, play big roles in ocean mixing
Israeli researchers have demonstrated that krill and jellyfish, as tiny as they may be, play a big role in ocean mixing.
Space & Earth / Earth Sciences
Jan 12, 2011 |
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Blame the 'chaperone'
A Jackson Laboratory research team led by Professor Patsy Nishina, Ph.D., has identified a mutation in a gene that's essential for correct protein-processing in cells. Defects in protein folding are associated with a variety ...
Jan 07, 2011 |
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Shedding light on a protein, and a future
While on a research co-op in London, Northeastern University senior Brendon Kellner investigated the inner workings of certain proteins through state-of-the-art ultrafast lasers. These lasers generate light ...
Dec 17, 2010 |
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Jellyfish
Stauromedusae Coronatae Semaeostomeae Rhizostomae
Jellyfish (also known as jellies or sea jellies) 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 jellyfish in these groups are also called, respectively, scyphomedusae, stauromedusae, cubomedusae, and hydromedusae; medusa is another word for jellyfish. (Medusa is also the word for jellyfish in Modern Greek, Finnish, Portuguese, Romanian, Hebrew, Serbian, Croatian, Spanish, Italian, Hungarian, Polish, Lithuanian, Czech, Slovak, Russian, Bulgarian and Catalan).[citation needed]
Jellyfish are found in every ocean, from the surface to the deep sea.[citation needed] 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. This article focuses on scyphomedusae. 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. 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.
For more information about Jellyfish, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.