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''Pterygoplichthys multiradiatus'' is one of several tropical fish commonly known as plecostomus (or plecos). It belongs to the armored catfish family (Loricariidae). Named for its sail-like dorsal fin, the part of its scientific name ''multiradiatus'' means "many-rayed" and refers to the rays of the dorsal fin. ''P. multiradiatus'' is one of a number of species commonly referred to as the common pleco by aquarists. Other scientific names that were used (as synonyms) for ''P. multiradiatus'' include ''Hypostomus multiradiatus'', ''Ancistrus multiradiatus'', and ''Liposarcus multiradiatus''. ''P. multiradiatus'' is sometimes confused with ''Pterygoplichthys pardalis'', which is a different species of pleco. ''P. multiradiatus'' goes by a number of common names. It can be called the "long-fin armored catfish" in Hawaii, "sailfin catfish", "sailfish catfish", "many-rayed (multiradiatus) pleco" or "radiated ptero" in the USA, 多輻翼甲鯰 in Mandarin Chinese and janitor fish in the Philippines, where it has become a local pest in the Marikina River and is sold in bulk, in efforts to eliminate the fish. ''P. multiradiatus'' is mottled brown/black and inhabits freshwater streams and lakes and in weedy, mud-bottomed canals in its native habitat: the Orinoco River basin in Venezuela. Its geographic distribution is 10°N - 1°N, 68°W - 61°W. This tropical, nocturnal bottom-dweller likes warm water at the temperature range of 23–27°C, pH range: 6.5–7.8, and dH range: 4–20. ''P. multiradiatus'' browses on substrate, mainly feeding on benthic algae and aquatic weeds, but will also take worms, insect larvae and other bottom-dwelling invertebrates as food. One of the large plecos (growing to a maximum of TL), this species likes solitude, is relatively peaceful as an aquarium fish and does well with cichlids and other big fish, and should be kept in large tanks only and with plenty of rocks and driftwood in which to hide. ''P. multiradiatus'' is not of interest in the fisheries, but is very important, as with many other plecos, in the aquarium trade. This species has been introduced to Hawaii (Maui, Oahu, Hawaii and Kauai islands), Puerto Rico, Vietnam, Bangladesh, México, and Florida, and has now established itself (accidentally or by release of aquarium specimens) in Kerala, S. India, Sri Lanka and The Philippines among other locations where it is regarded as a harmful invasive species being relatively inedible to people and predators, causing damage to fishing gear, competing and harming against native species and disrupting environments by its burrowing activities. In this context its relative, ''Hypostomus plecostomus'', has also been similarly implicated though it seems likely that in Asia, both or related species are implicated. ==See also== *List of freshwater aquarium fish species 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pterygoplichthys multiradiatus」の詳細全文を読む スポンサード リンク
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