apparently uknown by the people working. They thought it was an algea
eater, but I think this is Cobitis choii.
The picture is not very focused,, i am working on getting a better one,,
but in the mean time here it is:

He is roughly 2", serpentine, has a faint brown lateral line coloration, with
barely visable verticle straitions, and a single black spot at the base of its
tail fin.