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Group of upside-down jellyfish A series of confocal images, showing the musculature development of Cassopeia xamachana from planuloid bud to polyp. Cassiopea xamachana, commonly known as the upside-down jellyfish, is a species of jellyfish in the family Cassiopeidae.
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, although a few are anchored to the seabed by stalks rather
Aequorea victoria, also sometimes called the crystal jelly, is a bioluminescent hydrozoan jellyfish, or hydromedusa, that is found off the west coast of North America.. The species is best known as the source of aequorin (a photoprotein), and green fluorescent protein (GFP); two proteins involved in bioluminescence.
This energy makes up a small proportion of the diet of the jellyfish, and C. mosaicus is known to have less of this symbiotic zooxanthellae than many other Sychphozoa. [14] Catostylus mosaicus are also known to have relationships with other species, including fishes, spider crabs, shrimp, phyllosoma larvae, portunid crabs, and amphipods. [ 15 ]
While the cnidarian hosts provide shelter for these symbionts, the dinoflagellates in return use their photosynthetic abilities to provide the C. tuberculata with energy for usage and storage. Fatty acids, for example, are the primary macromolecules for energy storage in cnidarians, and are obtained mainly from their carbon-fixing symbionts.
The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism. [3] Scyphozoans have existed from the earliest Cambrian to the ...
Jellyfish are slow swimmers, and most species form part of the plankton. Traditionally jellyfish have been viewed as trophic dead ends, minor players in the marine food web, gelatinous organisms with a body plan largely based on water that offers little nutritional value or interest for other organisms apart from a few specialised predators such as the ocean sunfish and the leatherback sea turtle.
Alatina alata is a transparent box jellyfish with an pyramidal with rounded tip umbrella, smooth exumbrella and thin and transparent mesoglea. The manubrium is short, square, with four simple lips, and without mesenteries joining manubrium walls to subumbrellar stomach walls.