As far as I can tell (from looking at pics) these are A. facetus, though they were sold to me as A. oblongum. From what I've seen the oblongum don't have the red color in the fins or the metallic blue spangles peppered on the body. Apparently they've got quite a bit more growing to do, these aren't even half of the 20cm listed as their max size. They don't seem to be as aggressive as the accounts I've read either, but they are still young. Not so much as a split fin among the group so far, and they ignore the juvie L333 and BN pleco's aharing the 30 long.