Plastic pollution has emerged as one of the most pressing environmental challenges of our time. Over 100 million tons of plastic enters the environment each year, with more than 10 million tons ending up in our oceans. These ...
Environment
May 27, 2023
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How does animal behavior emerge from networks of connected neurons? How are these incredible nervous systems and behaviors actually generated by evolution? Are there principles shared by all nervous systems or is evolution ...
Plants & Animals
May 22, 2023
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60
The jellyfish galaxy JO175 appears to hang suspended in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies over 650 million light-years from Earth in the appropriately named constellation Telescopium and ...
Astronomy
May 8, 2023
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7
A Hong Kong Baptist University (HKBU)-led team has discovered a new species of box jellyfish in the Mai Po Nature Reserve in Hong Kong. The new jellyfish species, which belongs to the family Tripedaliidae, was named Tripedalia ...
Plants & Animals
Apr 18, 2023
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15
A team affiliated with multiple institutions in Japan has identified a peptide that signals feeding suppression in jellyfish. In their study, reported in Proceedings of the National Academy of Sciences, the group dissected ...
Drifting along in ocean currents, jellyfish can be both predator and prey. They eat almost anything they can capture, and follow the typical oceanic pattern of "large eats small." Now a recent University of British Columbia ...
Plants & Animals
Mar 20, 2023
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155
Billions of sea anemones adorn the bottom of the Earth's oceans—yet they are among the rarest of fossils because their squishy bodies lack easily fossilized hard parts. Now a team of paleontologists has discovered that ...
Paleontology & Fossils
Mar 8, 2023
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570
A "jellyfish galaxy" with trailing tentacles of stars hangs in inky blackness in this image from the NASA/ESA Hubble Space Telescope. As jellyfish galaxies move through intergalactic space, gas is slowly stripped away forming ...
Astronomy
Mar 6, 2023
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17
Achieving immortality is something that has driven human beings throughout much of their history. Many peculiar legends and fables have been told about the search for the elixirs of life. Medieval alchemists worked tirelessly ...
Plants & Animals
Jan 12, 2023
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A team of researchers at Universidad de Oviedo in Spain reports findings that could explain how the jellyfish Turritopsis dohrnii is able to live, at least in theory, forever. In their paper published in Proceedings of the ...
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.
This text uses material from Wikipedia, licensed under CC BY-SA
