Hi all,
They are difficult to identify, particularly in stress coloration.
Chaetostoma dorsale?
I haven't tried to keep them, but I believe they are pretty difficult to acclimatize.
There is a thread on PlanetCatfish (by "Bekateen") where he bought some (that had come in as bycatch with C. formosae), but it isn't very cheerful reading
cheers Darrel