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Siphonophorae (from Greek siphōn 'tube' + pherein 'to bear' [2]) is an order within Hydrozoa, which is a class of marine organisms within the phylum Cnidaria.According to the World Register of Marine Species, the order contains 175 species described thus far.
Apolemia uvaria, commonly known as string jellyfish, barbed wire jellyfish, [1] and long stringy stingy thingy, [2] is a siphonophore in the family Apolemiidae. [ 3 ] As with all siphonophores, string jellyfish may appear to be a single organism, but each specimen of Apolemia uvaria is a colony of specialised minute organisms called zooids .
A method of visualizing k-mers, the k-mer spectrum, shows the multiplicity of each k-mer in a sequence versus the number of k-mers with that multiplicity. [6] The number of modes in a k-mer spectrum for a species's genome varies, with most species having a unimodal distribution. [7] However, all mammals have a multimodal distribution.
Two branches from the tree-like colony are shown, with a feeding hydra (A) the tip of each twig. Buds at the base of the hydra (at B) eventually detach and grow into adult jellyfish (K) Scientific classification; Domain: Eukaryota: Kingdom: Animalia: Phylum: Cnidaria: Class: Hydrozoa: Order: Anthoathecata: Suborder: Filifera: Family: Oceaniidae
The medusae of most species are fast-growing, and mature within a few months then die soon after breeding, but the polyp stage, attached to the seabed, may be much more long-lived. Jellyfish have been in existence for at least 500 million years, [1] and possibly 700 million years or more, making them the oldest multi-organ animal group. [2]
Mayo Clinic states that most jellyfish stings, unless severe symptoms are also present, can be treated by: Carefully plucking visible tentacles from the skin with fine tweezers Soaking the skin in ...
a Beroe ovata, b unidentified cydippid, c "Tortugas red" cydippid, d Bathocyroe fosteri, e Mnemiopsis leidyi, and f Ocyropsis sp. [17]. Among animal phyla, the ctenophores are more complex than sponges, about as complex as cnidarians (jellyfish, sea anemones, etc.), and less complex than bilaterians (which include almost all other animals).
Gonionemus vertens, the clinging jellyfish, is a small species of hydrozoan in the family Olindiidae found in coastal regions throughout large parts of the Northern Hemisphere. [ 2 ] [ 3 ] Description and behavior