Koi/Kawai the climbing perch (Anabas testudineus) is a species of amphibious freshwater fish in the family Anabantidae (the climbing gouramis). A labyrinth fish native to Far Eastern Asia, the fish inhabits freshwater systems from India, Bangladesh and Sri Lanka in the west. It is likely that Anabas testudineus is a species complex, with the binomial name applied to what are actually several different species. With further study, populations of this fish may be divided up into separate species and given new names. In Nepalese Terai it is called “Pothiya”. In Bengali it is called “কৈ” (Koi). The climbing perch is euryhaline and can grow to 25 cm (9.8 in) in total length, The climbing perch is important as a food fish in certain regions of South Asia and Southeast Asia, where its ability to survive out of the water for extended periods of time, provided it is kept moist, improves its marketability.