Oryzias |
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| Japanese Killifish; Japanese Rice Fish; Medaka Killifish; Oryzias latipes; Oryziinae; Killifish, Medaka; Medakas | |
| The only genus in the family Oryziinae, order BELONIFORMES. Oryzias are egg-layers; other fish of the same order are livebearers. Oryzias are used extensively in testing carcinogens. | |