News tagged with jellyfish
Robotic jellyfish could one day patrol oceans, clean oil spills, and detect pollutants (w/ Video)
(Phys.org) -- Virginia Tech College of Engineering researchers are working on a multi-university, nationwide project for the U.S. Navy that one day will put life-like autonomous robot jellyfish in waters around ...
May 29, 2012 |
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Top 10 new species list draws attention to diverse biosphere
The International Institute for Species Exploration at Arizona State University and a committee of scientists from around the world announced their picks for the top 10 new species described in 2011. This ...
May 23, 2012 |
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Study investigates aquatic parasites on fish
Researchers in the Czech Republic, Spain and the United Kingdom have successfully identified the cellular components and mechanisms that play a role in the proliferation of myxozoa, tiny aquatic parasites ...
Apr 23, 2012 |
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Jellyfish on the rise: study
Jellyfish are increasing in the majority of the world's coastal ecosystems, according to the first global study of jellyfish abundance by University of British Columbia researchers.
Apr 18, 2012 |
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Jellyfish inspires latest ocean-powered robot (w/ video)
American researchers have created a robotic jellyfish, named Robojelly, which not only exhibits characteristics ideal to use in underwater search and rescue operations, but could, theoretically at least, never ...
Mar 20, 2012 |
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Seeing without eyes: Hydra stinging cells respond to light
In the absence of eyes, the fresh water polyp, Hydra magnipapillata, nevertheless reacts to light. They are diurnal, hunting during the day, and are known to move, looping end over end, or contract, in res ...
Mar 04, 2012 |
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A research challenges the theories on the global increase in jellyfish population
An international research, involving the participation of the Spanish National Research Council (CSIC), provides a new perspective on the jellyfish proliferation in world's oceans. This phenomenon has noticeably impacted ...
Feb 22, 2012 |
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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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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 ...
Sep 16, 2011 |
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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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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.
