About Oryzias latipes

The Japanese rice fish (Oryzias latipes), also known as the medaka and Japanese killifish, is a member of genus Oryzias (ricefish), the only genus in the subfamily Oryziinae. This small (up to about 3.6 cm or 1.4 in) native of East Asia is a denizen of rice paddies, marshes, ponds, s low-moving streams and tide pools. It is euryhaline, occurring in both brackish and freshwater. It became popular as an aquarium fish because of its hardiness and pleasant coloration: its co loration varies from creamy-white to yellowish in the wild to white, creamy-yellow, or orange in aquarium-bred individuals. Bright yellow, red or green transgenic populations, similar to Glo Fish, have also been developed, but are banned from sale in the EU. The medaka has been a popular pet since the 17th century in Japan. After fertilization, the female carries her eggs attach ed between her anal fins for a period before depositing them on plants or alike.

What's new

  • 2017.3.31

    "Medaka Genome Project" website was released.

Statistical information
Total length (bp) 789,742,100 749,060,523 808,961,282
Num. of scaffolds 920 1,477 1,190
Scaffold N50 (bp) 31,148,813 28,784,337 31,686,036
Num. of contigs 1,411 2,194 1,509
Contig N50 (bp) 2,416,720 1,303,079 3,258,597
GAP length 491,000 717,000 318,001