Georgian bitterling

The Georgian bitterling (Rhodeus colchicus) is a temperate freshwater fish belonging to the Acheilognathinae subfamily of the Cyprinidae family. It originates in the western portion of the Transcaucasia region of Georgia. It was originally described by Bogutskaya & Komlev in 2001. It reaches a maximum size of 6.8 cm (2.7 in).[2]