I just watched my four juvenile angels gang up on my plecostomus again. The angels were scattered around the tank, and the plecostomus swam up and stuck on the side glass on the other side of the tank. The four juvenile angels swam accross the tank from different areas and converged on the pleco simultaneously to chase it off the glass. The angels are black, and the pleco is black, could this be why? Then the angels dispersed after the pleco went back down to the gravel. I wonder if they are going to be terrors when they grow.
sorry for the loss!