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Craspedacusta sowerbii or peach blossom jellyfish [1] is a species of freshwater hydrozoan jellyfish, or hydromedusa cnidarian. Hydromedusan jellyfish differ from scyphozoan jellyfish because they have a muscular, shelf-like structure called a velum on the ventral surface, attached to the bell margin.
Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish [2] [3] found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of completely reverting to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual.
Jellyfish Lake is a marine lake where millions of golden jellyfish (Mastigias spp.) migrate horizontally across the lake daily. [82] Although most jellyfish live well off the ocean floor and form part of the plankton, a few species are closely associated with the bottom for much of their lives and can be considered benthic.
“This is my first time hearing about them in Stumpy Meadows Reservoir during my 9 years on the Eldorado National Forest,” said a federal aquatic biologist.
A few genera within this class live in freshwater habitats. Hydrozoans are related to jellyfish and corals , which also belong to the phylum Cnidaria . Some examples of hydrozoans are the freshwater jelly ( Craspedacusta sowerbyi ), freshwater polyps ( Hydra ), Obelia , Portuguese man o' war ( Physalia physalis ), chondrophores (Porpitidae ...
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.
Now, the mystery is solved: it is a placental jellyfish -- after many. For two years a mysterious sea creature has been captured on video as it swims 5,000 feet below the surface, but scientists ...
Unlike the hydrozoan jellyfish, Hydromedusae, Scyphomedusae lack a vellum, which is a circular membrane beneath the umbrella that helps propel the (usually smaller) Hydromedusae through the water. However, a ring of muscle fibres is present within the mesoglea around the rim of the dome, and the jellyfish swims by alternately contracting and ...
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