[bartian]

Yes, some (all?) forms have that. My first paro species looked very similar to your fish. I still have offspring of them, which seem to have a stronger red-brown band in the caudal. It dissappears when displaying. When displaying aggressively, their fins become black, with grey bands instead of blue. At times their fins are completely black, without any bands (except for the white seam, which is always visible). They’re now living with my sumatranus, which they seem to ignore completely.