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Tridacna
''Tridacna'' is a genus of large saltwater clams, Marine (ocean), marine bivalve molluscs in the subfamily Tridacninae, the giant clams. Many Tridacna species are threatened. They have heavy shells, fluted with 4 to 6 folds. The Mantle (mollusc), mantle is often brightly coloured. They inhabit shallow waters of coral reefs in warm seas of the Indo-Pacific region.Huelsken, T., Keyse, J., Liggins, L., Penny, S., Treml, E.A., Riginos, C. (2013) A Novel Widespread Cryptic Species and Phylogeographic Patterns within Several Giant Clam Species (Cardiidae: Tridacna) from the Indo-Pacific Ocean. PLoS ONEDOI: 10.1371/journal.pone.0080858 These clams are popular in marine aquarium, marine aquaria, and in some areas, such as the Philippines, members of the genus are farmed for the marine aquarium trade. They live in symbiosis with photosynthetic algae (zooxanthellae). Some species are eaten by humans. All species in the genus ''Tridacna'' are protected under CITES Appendix II. Etymology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giant Clam (Tridacna)
''Tridacna gigas'', the giant clam, is the best-known species of the giant clam genus ''Tridacna''. Giant clams are the largest living bivalve molluscs. Several other species of "giant clam" in the genus ''Tridacna'' are often misidentified as ''Tridacna gigas''. These clams were known to indigenous peoples of East Asia for thousands of years and the Venetian scholar and explorer Antonio Pigafetta documented them in a journal as early as 1521. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans, they may weigh more than , measure as much as across, and have an average lifespan in the wild of more than 100 years. They also are found off the shores of the Philippines and in the South China Sea in the coral reefs of Malaysia. The giant clam lives in flat coral sand or broken coral and may be found at depths of as great as 20 m (66 ft). Its range covers the Indo-Pacific, but populations are diminishing quickly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Maxima
The maxima clam (''Tridacna maxima''), also known as the small giant clam, is a species of bivalve mollusc found throughout the Indo-Pacific region.MolluscaBase eds. (2022). MolluscaBase. Tridacna maxima (Röding, 1798). Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=207675 on 2022-10-13 They are much sought after in the aquarium trade, as their often striking coloration mimics that of the true giant clam; however, the ''maximas'' maintain a manageable size, with the shells of large specimens typically not exceeding in length. Description Bivalves have two valves on the mantle. These siphon water through the body to extract oxygen from the water using the gills and to feed on algae.Ellis, S. (1998) Spawning and early larval rearing of giant clams (Bivalvia: Tridacnidae). Center for Tropical and Subtropical Aquaculture, 130: 1–55. The ''maxima'' is less than one-third the size of the true giant clam (''Tridacna gigas' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Derasa
''Tridacna derasa'', the southern giant clam or smooth giant clam, is a species of extremely large marine clam in the family Cardiidae. Description The southern giant clam is one of the largest of the "giant clams", reaching up to 60 cm in length.CITES: Twenty-second Meeting of the Animals Committee , Lima (Peru), 7–13 July 2006 (January 2007). The species is also known as the smooth giant clam because of the relative lack of ribbing and scales on its thick shell. The smoothness of the southern giant clam's shell and its six to seven vertical folds help to distinguish it from its larger relative, ''Tridacna gigas'', which has four to five folds and a rougher texture. Lack of scutes (scale-like protrusions of the shell) that are present in most other ''Tridacna'' species is a defining c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Crocea
''Tridacna crocea'', the boring clam, crocus clam, crocea clam or saffron-coloured clam, is a species of bivalve in the family Cardiidae. It is native to the Indo-Pacific region. It is occasionally found in the aquarium trade Huelsken, T., Keyse, J., Liggins, L., Penny, S., Treml, E.A., Riginos, C. (2013) A Novel Widespread Cryptic Species and Phylogeographic Patterns within Several Giant Clam Species (Cardiidae: Tridacna) from the Indo-Pacific Ocean. PLoS ONEDOI: 10.1371/journal.pone.0080858 where it is often simply referred to as ''crocea''. Description The boring clam is the smallest clam in the subfamily Tridacninae and grows to a maximum shell size of . It has two, thick valves joined by a hinge which is typically between a third and less than a half of the width of the shell. Typically shells are slightly to moderately elongate, and the animal is strongly inflated, especially near the hinge. The upper valve has six to ten flattish folds which interlock at the margin with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Rosewateri
''Tridacna rosewateri'', or Rosewater's giant clam, is a species of marine bivalve in the family Cardiidae.MolluscaBase eds. (2022). MolluscaBase. Tridacna rosewateri Sirenko & Scarlato, 1991. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=466760 on 2022-10-13 For a while, the species was thought to be extinct, until it was redicovered in 2020. It was thought to be a new species, Tridacna lorenzi, but further research has shown that it is actually Rosewater’s giant clam. Distribution It is endemic to Mauritius. Its type locality was given as the " Saya de Malha Bank, Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...."Sirenho & Scarlato, 1991-''La Conchiglia, Year.XXII, No. 261, Oct-Dec.1991'', pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Noae
''Tridacna noae'', also known as Noah’s giant clam or the Teardrop giant clam, is a species of giant clam. Up until recently, ''T. noae'' was confused with the small giant clam ''Tridacna maxima'', but is now known to be its own independent species. It has a broad distribution in the Indo-Pacific. As with all giant clams, populations of ''T. noae'', are declining due to human exploitation of flesh for consumption, shells, and as aquarium pets. ''T. noae'' and all members of '' Tridacninae'' are considered endangered, and have been since 1985. Taxonomy ''T. noae'' are marine bivalve molluscs in the subfamily '' Tridacninae'', also known as giant clams. ''T. noae'' was originally described and named by Röding (1798) based on figures in Chemnitz (1784). Description ''T. noae'' have a physical appearance typical to that of most bivalves, especially those in the '' Tridacninae'', or giant clam, subfamily. ''T. noae'' typically have a shell length between 6–20 cm, and sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Mbalavuana
''Tridacna mbalavuana'', the tevoro clam, is a species of bivalve in the family Cardiidae. It is found in Fiji and Tonga. It is currently listed on the IUCN Red List of Threatened Species The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological spe .... References mbalavuana Molluscs of the Pacific Ocean Molluscs described in 1934 Taxonomy articles created by Polbot {{Cardiidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacninae
Tridacnidae, common name the giant clams, is a taxonomic subfamily of very large saltwater clams, marine bivalve molluscs in the family Cardiidae, the cockles. Description This subfamily contains the largest living bivalve species, including ''Tridacna gigas'', the giant clam. They have heavy shells, fluted with 4–6 folds. The mantle is usually brightly colored. They inhabit coral reefs in warm seas in the Indo-Pacific region. Most of these clams live in symbiosis with photosynthetic dinoflagellates ( zooxanthellae), a type of photosymbiosis. Systematics Sometimes the giant clams are still treated as a separate family Tridacnidae, but modern phylogenetic analyses included them in the family Cardiidae as a subfamily. Two recent genera and eight species are known: * ''Hippopus''—2 species * ''Tridacna''—10 species Recent genetic evidence has shown them to be monophyletic sister taxa. Image:Hippopus hippopus Vanuatu 01.jpg, Live '' Hippopus hippopus'' (Vanuatu) Image: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalve
Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-bivalve shell, shells known as valve (mollusc), valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidium (mollusc), ctenidia, specialised organs for feeding and breathing. Common bivalves include clams, oysters, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), families that live in saltwater, as well as a number of families that live in freshwater. Majority of the class are benthic filter feeders that bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
