I have a a firemouth and a salvini-both about 1.5" long. The FM wandered too close to the salvini's PVC pipe home and ended up with a mouthfull. The FM would try to break loose, but the salvini would just hold on tighter. This yellow one is going to be trouble when she gets grows up.
She is in with a JD that is about 4 times her size. The sal will flare her gills and shake at the JD until the JD lunges after her. The she stops all the bull and goes and hides.