I'm no expert. At first I thought that it looked like a L204, Flash Pleco (does it look like this up close, see Planet Catfish), but it seems to have very large eyes and it's face seems to be rounded like a Hypancistrus sp., but this could just be the angle ofthe shot :-? A clearer pic would be a great help. Do you mind if I ask how much you paid for it? If it is a L204 they normaly cost around $180+.
Cheers, CatBrat.