Ricefish

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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 Indo-Australian Archipelago, most notably Sulawesi. About 27 species, some extremely rare and endangered, and some 2-4 may already be extinct.

Most of these species are quite small, with maximum lengths in the 2-4 cm range, making them of interest for aquaria.

Several species carry their eggs attached to the body between their pelvic fins.

The medaka, Oryzias latipes, is a popular model organism used in research in developmental biology.

Genetic study of the family suggests that it originally evolved on Sulawesi and spread from there to the Asian mainland.

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