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The Japanese rice fish (Oryzias latipes), also known as the medaka, [2] is a member of genus Oryzias (), the only genus in the subfamily Oryziinae.This small (up to about 3.6 cm or 1.4 in) native of Japan is a denizen of rice paddies, marshes, ponds, slow-moving streams and tide pools.
Oryzias is a genus of ricefishes native to fresh and brackish water in east and south Asia. [4] Some species are widespread and the Japanese rice fish ( O. latipes ) is commonly used in science as a model organism , while others have very small ranges and are threatened. [ 4 ]
The Chinese rice fish (Oryzias sinensis) is a species of fish in the genus Oryzias. This freshwater fish occurs in swamps, stagnant parts of streams, rice fields and marshes, and is up to 3.1 cm (1.2 in) long. [2] It was formerly considered a subspecies of the Japanese rice fish (Oryzias latipes). [1]
Two species of fish, zebrafish (Danio rerio) and medaka (Japanese rice fish, Oryzias latipes), are most commonly modified because they have optically clear chorions (shells), develop rapidly, the 1-cell embryo is easy to see and micro-inject with transgenic DNA, and zebrafish have the capability of regenerating their organ tissues. [9]
The ricefish were formerly classified within the order Cyprinodontiformes but in the 1980s workers showed that they were a monophyletic grouping, mainly based on the characters on the bones of the gill arches and the hyoid apparatus, within the Beloniformes as the family Adrianichthyidae, this family making up one of the three suborders of the Beloniformes, the Adrianichthyoidei.
Oryzias melastigma is a species of ricefish in the family Adrianichthyidae. This killifish was described by Sir John McLelland in 1839. [ 2 ] It is listed as Least Concern on the IUCN Red List .
Oryzias carnaticus or the spotted ricefish are a freshwater–brackish fish species native to the India, Bangladesh, Sri Lanka, and Myanmar. Their maximum length is only 3.0 centimetres (1.2 in). Their maximum length is only 3.0 centimetres (1.2 in).
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