its a rainbow garra (Garra flavatra) beautiful fish, can sometimes be a bit delicate if not propery settled in, they are meant to max at just over 2 inch but one of my 2 i used to have was pushing 4 inch!
It is not a plecos or a loach that's for sure. It does not look like a catfish. I would say it looks more like a Garra flavatra - Panda Garra too. the colourin the fins the head. The makings match perfectly to one.
no bother,
You should have got them both!
Not normally too ceap,i had 2 1 hit almost 4 inch and the other 3 inch so id only use 6cm as a rough idea!
Dave