News tagged with 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).
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. 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.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Fun in the summer often means kids spending time in the water, whether at a pool, the beach, a lake or river. A pediatric safety expert at the University of Alabama at Birmingham (UAB) stresses proper training ...
Health 3 hours ago | not rated yet | 0
Box jellyfish of the Chironex species are among the most venomous animals in the world, capable of killing humans with their sting. Their venom, though, which kills by rapidly punching holes in human red bl ...
Medical research Dec 12, 2012 | 5 / 5 (4) | 0 |
Jellyfish inspire scientists to invent a device that can detect, capture and release rare cancer cells
Tumor cells circulating in a patient's bloodstream can yield a great deal of information on how a tumor is responding to treatment and what drugs might be more effective against it. But first, these rare ...
Cancer Nov 12, 2012 | not rated yet | 0 |
Using bioluminescent proteins from a jellyfish, a team of scientists has lit up the inside of a neuron, capturing spectacular video footage that shows the movement of proteins throughout the cell.
Neuroscience Aug 22, 2012 | 5 / 5 (6) | 0 |
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 ...
Medical research Jan 25, 2012 | 5 / 5 (1) | 0 |