|
Polyorchis
''Polyorchis'', or bell jellies, is a genus of hydrozoans in the family Corynidae. They are transparent with red coloration in their internal organs and eye spots around the rim of their bell. The red pigmentation helps them camouflage. They are often found in harbors, marinas, and other calm waters close to shore. They feed on plankton and benthic crustaceans and are found near the sea floor. The bells can reach about 2.25 inches (5 cm). '' P. penicillatus'' is nicknamed "red-eyed jellyfish". At the base of the tentacles are several eyes, called ocelli, which contain light-sensing cells and red pigment A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored sub ...s. Anna Klompen ''et al.''Peering Into the Inner Workings of Evolution With Jellyfish Eyes On: SciTechDaily, April 8, 202 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corynidae
Corynidae is a family of hydrozoans in the order Anthomedusae. Derivation of family name The family name ''Corynidae'' is derived from the Greek word κορυνε ( = ''korune'' ) meaning "club" ( in the sense of "cudgel" or "bludgeon" ). Genera The following genera are included in the family: *''Bicorona (hydrozoan), Bicorona'' Millard, 1966 *''Caltsacoryne'' Toshino, Hamatsu & Uchida, 2021 *''Cladosarsia'' Bouillon, 1978 *''Codonium'' Haeckel, 1879 *''Coryne'' Gaertner, 1774 *''Dicyclocoryne'' Annandale, 1915 *''Dipurenella'' Huang, Xu & Guo, 2011 *''Nannocoryne'' Bouillon & Grohmann, 1994 *''Polyorchis'' A. Agassiz, 1862 *''Sarsia'' Lesson, 1843 *''Scrippsia'' Torrey, 1909 *''Slabberia'' Forbes, 1846 *''Spirocodon'' Haeckel, 1880 *''Stauridiosarsia'' Mayer, 1910 References Corynidae, Capitata Cnidarian families Taxa named by George Johnston (naturalist) {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrozoa
Hydrozoa (hydrozoans; from Ancient Greek ('; "water") and ('; "animals")) is a taxonomy (biology), taxonomic class (biology), class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colony (biology), colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genus, genera within this class live in freshwater ecosystem, freshwater habitats. Hydrozoans are related to jellyfish and corals, which also belong to the phylum (biology), phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps (''Hydra (genus), Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polyp (zoology), polypoid and a medusa (biology), medusoid stage in their Biological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocelli
A simple eye or ocellus (sometimes called a pigment pit) is a form of eye or an optical arrangement which has a single lens without the sort of elaborate retina that occurs in most vertebrates. These eyes are called "simple" to distinguish them from " compound eyes", which have multiple lenses. They are not necessarily simple in the sense of being uncomplicated or basic. The structure of an animal's eye is determined by the environment in which it lives, and the behavioural tasks it must fulfill to survive. Arthropods differ widely in the habitats in which they live, as well as their visual requirements for finding food or conspecifics, and avoiding predators. Consequently, an enormous variety of eye types are found in arthropods to overcome visual problems or limitations. Use of the term ''simple eye'' is flexible, and must be interpreted in proper context; for example, the eyes of most large animals are '' camera eyes'' and are sometimes considered "simple" because a sing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigment
A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use. Dyes are often organic compounds whereas pigments are often inorganic compound, inorganic. Pigments of prehistoric and historic value include ochre, charcoal, and lapis lazuli. Economic impact In 2006, around 7.4 million tons of inorganic chemistry, inorganic, organic chemistry, organic, and special pigments were marketed worldwide. According to an April 2018 report by ''Bloomberg Businessweek'', the estimated value of the pigment industry globally is $30 billion. The value of titanium dioxide – used to enhance the white brightness of many products – was placed at $13.2 billion per year, while the color Ferrari red is valued at $300 million each yea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
