The Red-tailed Tinfoil Barb is native to streams, rivers and flooded fields of Indochina. It is similar in appearance to the (Schwanefeld's) Tinfoil Barb, B. schwanenfeldii but has a wholly red tail fin without the black lines. The image above left is believed to be of the Red-tailed or Altus Tinfoil. Those above centre and right may be but are unclear - they have shadows on the tail edges and haven't developed a red dorsal fin, but may be regular Tinfoils.

The head shape looks more like the Sultan Barb but with the very red tail this is probably one of the Tinfoil species.