Gyrinocheilus aymonieri is a freshwater fish that is native to large parts of southeast Asia. It is of interest as a local food source and for the aquarium trade, being first imported into Germany in 1956.
G. aymonieri is found in the Chao Phraya basin, northern Malay Peninsula, Mekong basin (in Cambodia, Yunnan province in China, Laos and Thailand),Mae Klong basin and Xe Bang Fai River. It is most often seen in large rivers, occasionally entering flooded fields. The fish spend most of their time on flat surfaces, such as rocks, in flowing water, using its unusually formed inferior mouth to attach itself to rocks in stronger flows.The fish are sold in local markets as a food source and small fish are used in preparation of prahok.