Subfamily Adrianichthyinae Weber, 1913 Subfamily Oryziinae Myers, 1938 The ricefishes are a family (Adrianichthyidae) of small ray-finned fish that are found in fresh and brackish waters from India to Japan and out into the Malay Archipelago, most notably Sulawesi (where the Lake Poso and Lore Lindu species are known as buntingi).

[5] They have a number of distinctive features, including an unusual structure to the jaw, and the presence of an additional bone in the tail.

[2] The Japanese rice fish (O. latipes), also known as the medaka, is a popular model organism used in research in developmental biology.

[6] Genetic study of the family suggests that it originally evolved on Sulawesi and spread from there to the Asian mainland; the supposed genus Xenopoecilus are apparently unrelated, morphologically divergent species of Oryzias.

However, some species, including the Japanese ricefish, are known to fertilise the eggs internally, carrying them inside the body as the embryo develops.