Oily bitterling
The oily bitterling is a temperate freshwater ray-finned fish belonging to the family Acheilognathidae, the bitterlings.. 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 TL.