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Choriaster Granulatus
''Choriaster'' is monotypic genus in the family Oreasteridae containing the single species ''Choriaster granulatus'' commonly known as the granulated sea star. Other common names include big-plated sea star and doughboy starfish. This species is harmless to humans. Description ''Choriaster granulatus'' is a large sea star with a convex body and five short arms. The arms have rounded tips, making it appear "chubby", leading to one of its common names being "the doughboy starfish". Relatively large in comparison with other sea stars, its maximum radius is about . It is most commonly pale pink in colour with brown papillae radiating out from the centre but can also be colours ranging from grey to yellow and even red. Location This species is found in numerous tropical waters, including: * East Africa * Indo-Pacific region * Great Barrier Reef * Red Sea * Vanuatu * Fiji * Papua New Guinea Habitat ''Choriaster granulatus'' prefers shallow waters ranging from deep and above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choriaster Granulatus
''Choriaster'' is monotypic genus in the family Oreasteridae containing the single species ''Choriaster granulatus'' commonly known as the granulated sea star. Other common names include big-plated sea star and doughboy starfish. This species is harmless to humans. Description ''Choriaster granulatus'' is a large sea star with a convex body and five short arms. The arms have rounded tips, making it appear "chubby", leading to one of its common names being "the doughboy starfish". Relatively large in comparison with other sea stars, its maximum radius is about . It is most commonly pale pink in colour with brown papillae radiating out from the centre but can also be colours ranging from grey to yellow and even red. Location This species is found in numerous tropical waters, including: * East Africa * Indo-Pacific region * Great Barrier Reef * Red Sea * Vanuatu * Fiji * Papua New Guinea Habitat ''Choriaster granulatus'' prefers shallow waters ranging from deep and above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Occidental Mindoro
Occidental Mindoro ( tl, Kanlurang Mindoro), officially the Province of Occidental Mindoro, is a province in the Philippines located in the Mimaropa region. The province occupies the western half of the island of Mindoro. Its capital is Mamburao, but the largest municipality is San Jose. As of 2020, Occidental Mindoro has 525,354 inhabitants. The province is bordered on the east by the province of Oriental Mindoro, and on the south by the Mindoro Strait. The South China Sea is to the west of the province and Palawan is located to the southwest, across the Mindoro Strait. Batangas is to the north, separated by the Verde Island Passage, a protected marine area and the center of the center of the world's marine biodiversity. History Mindoro Island was originally known to the ancients as ''Ma-i''. It was formally called ''Mait'', and known to the Chinese traders before the coming of the Spanish. Its existence was mentioned in the old Chinese chronicles in 775 A.D. and more elabora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreasteridae - Choriaster Granulatus
The Oreasteridae are a family of sea stars in the class Asteroidea. Description and characteristics This family contains many species of regular starfishes with usually 5 arms around a stiff, convex and often brightly colored body. Whereas some species are very easy to identify, like the "pincushion seastars" ('' Culcita sp.''), some other can be difficult to tell apart. Selected genera : List source : * genus '' Acheronaster'' H.E.S. Clark, 1982 -- 1 species * genus '' Anthaster'' Döderlein, 1915 -- 1 species * genus '' Anthenea'' Gray, 1840 -- 22 species * genus '' Astrosarkus'' Mah, 2003 -- 1 species * genus '' Bothriaster'' Döderlein, 1916 -- 1 speciesProbably just the juvenile form of '' Choriaster''. * genus '' Choriaster'' Lutken, 1869 -- 1 species * genus '' Culcita'' Agassiz, 1836 -- 3 species * genus '' Goniodiscaster'' H.L. Clark, 1909 -- 14 species * genus ''Gymnanthenea'' H.L. Clark, 1938 -- 2 species * genus ''Halityle'' Fisher, 1913 -- 1 species * genus ''Mona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 1842
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, 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 Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coral Bleaching
Coral bleaching is the process when corals become white due to various stressors, such as changes in temperature, light, or nutrients. Bleaching occurs when coral polyps expel the zooxanthellae (dinoflagellates that are commonly referred to as algae) that live inside their tissue, causing the coral to turn white. The zooxanthellae are photosynthetic, and as the water temperature rises, they begin to produce reactive oxygen species. This is toxic to the coral, so the coral expels the zooxanthellae. Since the zooxanthellae produce the majority of coral colouration, the coral tissue becomes transparent, revealing the coral skeleton made of calcium carbonate. Most bleached corals appear bright white, but some are blue, yellow, or pink due to pigment proteins in the coral. The leading cause of coral bleaching is rising ocean temperature due to climate change. A temperature about 1 °C (or 2 °F) above average can cause bleaching. According to the United Nations Environment Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Acidification
Ocean acidification is the reduction in the pH value of the Earth’s ocean. Between 1751 and 2021, the average pH value of the ocean surface has decreased from approximately 8.25 to 8.14. The root cause of ocean acidification is carbon dioxide emissions from human activities which have led to atmospheric carbon dioxide (CO2) levels of more than 410 ppm (in 2020). The oceans absorb CO2 from the atmosphere. This leads to the formation of carbonic acid (H2CO3) which dissociates into a bicarbonate ion () and a hydrogen ion (H+). The free hydrogen ions (H+) decrease the pH of the ocean, therefore increasing acidity (this does not mean that seawater is acidic yet; it is still alkaline, with a pH higher than 8). A decrease in pH corresponds to a decrease in the concentration of carbonate ions, which are the main building block for calcium carbonate (CaCO3) shells and skeletons. Marine calcifying organisms, like mollusks, oysters and corals, are particularly affected by this as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Reproduction
Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete ( haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes ( diploid). This is typical in animals, though the number of chromosome sets and how that number changes in sexual reproduction varies, especially among plants, fungi, and other eukaryotes. Sexual reproduction is the most common life cycle in multicellular eukaryotes, such as animals, fungi and plants. Sexual reproduction also occurs in some unicellular eukaryotes. Sexual reproduction does not occur in prokaryotes, unicellular organisms without cell nuclei, such bacteria and archaea. However, some process in bacteria may be considered analogous to sexual reproduction in that they incorporate new genetic information, including bacterial conjugation, transformatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asexual Reproduction In Starfish
Asexual reproduction in starfish takes place by fission or through autotomy of arms. In fission, the central disc breaks into two pieces and each portion then regenerates the missing parts. In autotomy, an arm is shed with part of the central disc attached, which continues to live independently as a "comet", eventually growing a new set of arms. Although almost all sea stars can regenerate their limbs, only a select few sea star species are able to reproduce in these ways. Fission Fissiparity in the starfish family Asteriidae is confined to the genera ''Coscinasterias'', '' Stephanasterias'' and ''Sclerasterias''. Another family in which asexual reproduction by fission has independently arisen is the Asterinidae. The life span is at least four years. A dense population of '' Stephanasterias albula'' was studied at North Lubec, Maine. All the individuals were fairly small, with arm lengths not exceeding , but no juveniles were found, suggesting that there had been no recent larva ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroidea
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plankton
Plankton are the diverse collection of organisms found in Hydrosphere, water (or atmosphere, air) that are unable to propel themselves against a Ocean current, current (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a crucial source of food to many small and large aquatic organisms, such as bivalves, fish and whales. Marine plankton include bacteria, archaea, algae, protozoa and drifting or floating animals that inhabit the saltwater of oceans and the brackish waters of estuaries. Freshwater plankton are similar to marine plankton, but are found in the freshwaters of lakes and rivers. Plankton are usually thought of as inhabiting water, but there are also airborne versions, the aeroplankton, that live part of their lives drifting in the atmosphere. These include plant spores, pollen and wind-scattered seeds, as well as microorganisms swept into the air from terrestrial dust storms and oceanic plankton swept into the air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carrion
Carrion () is the decaying flesh of dead animals, including human flesh. Overview Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters (or scavengers) include crows, vultures, condors, hawks, eagles, hyenas, Virginia opossum, Tasmanian devils, coyotes and Komodo dragons. Many invertebrates, such as the carrion and burying beetles, as well as maggots of calliphorid flies (such as one of the most important species in '' Calliphora vomitoria'') and flesh-flies, also eat carrion, playing an important role in recycling nitrogen and carbon in animal remains. Carrion begins to decay at the moment of the animal's death, and it will increasingly attract insects and breed bacteria. Not long after the animal has died, its body will begin to exude a foul odor caused by the presence of bacteria and the emission of cadaverine and putrescine. Some plants and fungi smell like decomposing carrion and attract insects that a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papua New Guinea
Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country in Oceania that comprises the eastern half of the island of New Guinea and its offshore islands in Melanesia (a region of the southwestern Pacific Ocean north of Australia). Its capital, located along its southeastern coast, is Port Moresby. The country is the world's third largest island country, with an area of . At the national level, after being ruled by three external powers since 1884, including nearly 60 years of Australian administration starting during World War I, Papua New Guinea established its sovereignty in 1975. It became an independent Commonwealth realm in 1975 with Elizabeth II as its queen. It also became a member of the Commonwealth of Nations in its own right. There are 839 known languages of Papua New Guinea, one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
