Notopterus chitala (Notopteridae)
The Indian knifefish or clown knifefish lives in Asia in slightly alkaline waters.
It can swim both forwards and backwards, and tends to be nocturnal. Several species
have proved marketable; one of them, Notopterus notopterus, which has only recently
been successfully bred in captivity, is used as a food source in certain parts of
the world. Size: 20-30 cm.