medaka
/məˈdɑːkə/noun
1- a small, slender freshwater fish with the dorsal fin set back near the tail, native to parts of SE Asia and Japan鳉, 青鳉。
1.1
- Family Oryziatidae and genus Oryzias: several species.青鳉科, 青鳉属：数种。
词源
early 20th cent.: from Japanese me（y） 'eye' + -daka 'high'.