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Jellyfish, also known as sea jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a
Jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa (approximately 20 species). Learn more about the characteristics and natural history of jellyfish in this article.
- The Editors of Encyclopaedia Britannica
How much do you really know about jellyfish? Given their diverse evolutionary history, jellies exhibit a fantastic range of shapes, sizes, and behaviors. Learn all about these squishy, brainless...
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- Nat Geo WILD
Jellyfish have drifted along on ocean currents for millions of years, even before dinosaurs lived on the Earth. The jellylike creatures pulse along on ocean currents and are abundant in cold and warm ocean water, in deep water, and along coastlines. But despite their name, jellyfish aren't actually fish—they're invertebrates, or animals with no backbones. Jellyfish have tiny stinging cells ...
29 ott 2009 · Jellyfish aren’t fish but invertebrates, animals that lack backbones and even brains. Yet 30,000-odd species do far more than survive—they thrive in ocean waters the world over.
29 mar 2024 · Discover facts about gelatinous jellyfish, including what they eat, how they move and the clever stinging adaptation that has helped them flourish for millions of years. Jellyfish are older than the dinosaurs.
Jellyfish | National Geographic. With no brains, no heart, and no blood, it's amazing jellyfish have existed for 650 million years! Subscribe: http://bit.ly/NatGeoSubscribe About National ...
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- National Geographic
