This is my red BN pleco and his buddy/mortal enemy the CPO.
They share a 15 gal tank with hundreds of shrimp. The CPO is absurdly bad at catching them even though he tries regularly.
The two often fight over food with the CPO grabbing hold of the pleco's spikes and the pleco shaking him off and trying to push him around.
Seems like they're getting along though, never seen any damage and they can sit right next to each other and eat as long as I'm feeding small pellets instead of a single large one.

Hanging out by ChristianHass, on Flickr