Im going to have to agree with thisMy guess is Dekeyseria brachyura or at least that genus given the flatness of the head. Common name butterfly Pleco.
This was my initial thought. But the side profile picture has me second guessing it...maybe L134
L52 and L168 are both in the Dekeyseria genus. Either is a reasonable guess and both are commonly referred to as butterfly plecos.Defently a flathead pleco. I thought the flatness was cool and that is why I bought it.
How about an L052, Atabapo Butterfly?