I suspect that the Otos are more to "blame" for the reduction in algae
but yes, Labeos (actually, it's now in a different genus but I can't
remember which one offhand) are herbivorous. Both my L. bicolor and
frenatus are steady consumers of algae.
> I recently added a black shark to my plant tank, as I have heard that they will
> eat algae. Can anyone else confirm this. The hair and beard algae have been
> severely trimmed back since I added the shark and 6 otos. I have not noticed
> any plant damage that I can attribute to the fish.