This species is endemic to the Quang Ninh province of Vietnam, though the full extent of its natural range is unknown. Black Paradise Fish are typically found in lowland habitats such as rice paddies, streams and marshes as well as slow-moving rivers. Black Paradise Fish have dark bodies and males of the species typically exhibit red fringing on the fins – females may be lighter in color. Males of the species are also larger than females and may develop more extended fins.