- Elongated barb-like body; dorsal spine serrate; lower lip with a posterior
groove forming a pocket opening backwards. Plain silver body with black
margins on dorsal, caudal, anal and pelvic fins. Attains 25 cm. Possibly
different species from B. melanopterus (Ng, H.H. pers. com., 2005), if
approved, it means globally Extinct.

- Benthos and algae feeder. Mainstreams and marshlands, floodplains. Rarely
seen in the Mekong basin, the common fish in aquarium markets come
from Indonesian broodstocks. Habitat lost and overfishing.

- Middle Chao Phraya, Lower Mekong basins and Kalimantan.