The oily bitterling (Tanakia limbata) is a temperate freshwater fish belonging to the Acheilognathinae sub-family of the family Cyprinidae.

It originates in creeks with fast-running water in central and southern Japan.

It was originally described as Capoeta limbata by Temminck & Schlegel in 1846, and has also been referred to as Acheilognathus limbatus and Acheilognathus limbata in scientific literature.

The fish reaches a size of up to 6 cm (2.4 in) TL.

This Acheilognathinae article is a stub.