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Mastigias Siderea
''Mastigias siderea'' is a species of jellyfish in the family Mastigiidae. It is native to the southern Pacific Ocean. Description The medusa of ''M. siderea'' grows to a diameter of about . There are about 60 marginal lappets and the surface of the bell is sculptured with deep radial furrows between these. The eight mouth arms are as long as the diameter of the bell, terminating in club-shaped filaments. There are seven radial canals which link to the ring canal. The bell is pale yellowish-brown with white spots; these are small near the margin but larger over the ring canal. The mouth arms are brown, spotted with white, and the terminal filaments are yellowish. Distribution ''M. siderea'' occurs in the southern Pacific Ocean. It is a pelagic The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastigiidae
Mastigiidae is a family of true jellyfish. The family is native to the Indo-Pacific, but a species of '' Mastigias'' has been introduced to the West Atlantic, and '' Phyllorhiza punctata'' has been introduced to the West Atlantic and Mediterranean Sea.Cevik, C., O. B. Derici1, F. Cevik and L. Cavas (2011). ''First record of Phyllorhiza punctata von Lendenfeld, 1884 (Scyphozoa: Rhizostomeae: Mastigiidae) from Turkey.'' Aquatic Invasions 6(1): S27–S28 Genera According to the ''World Register of Marine Species'', this family includes 4 genera: * '' Mastigias'' * '' Mastigietta'' * '' Phyllorhiza'' * '' Versuriga'' – probably belongs in a separate monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ... family, Versurigidae.Daly, Brugler, Cartwright, Collins, Dawson, Fautin, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medusa (biology)
Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are anchored to the seabed by stalks rather than being mobile. The bell can pulsate to provide propulsion for highly efficient locomotion. The tentacles are armed with stinging cells and may be used to capture prey and defend against predators. Jellyfish have a complex life cycle; the medusa is normally the sexual phase, which produces planula larvae that disperse widely and enter a sedentary polyp phase before reaching sexual maturity. Jellyfish are found all over the world, from surface waters to the deep sea. Scyphozoans (the "true jellyfish") are exclusively marine, but some hydrozoans with a similar appearance live in freshwater. Large, often colorful, jellyfish are common in c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic
The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the surface of the sea and the bottom. Conditions in the water column change with depth: pressure increases; temperature and light decrease; salinity, oxygen, micronutrients (such as iron, magnesium and calcium) all change. Marine life is affected by bathymetry (underwater topography) such as the seafloor, shoreline, or a submarine seamount, as well as by proximity to the boundary between the ocean and the atmosphere at the ocean surface, which brings light for photosynthesis, predation from above, and wind stirring up waves and setting currents in motion. The pelagic zone refers to the open, free waters away from the shore, where marine life can swim freely in any direction unhindered by topographical constraints. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 1896
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
