it's highly unlikely that a male will turn back..most likely, as mentioned, one will become dominant and eventually kill off the others by not allowing the others to feed or from injuries unless it's a very large tank, but this also depends on the species of anthias because some are more aggressive than others. If the others are not in full male coloration most likely they will remain as sub-males until the dominant male is gone.....I have Lyretails and Bartletts, which are both aggressive species, that have remained in the sub-male stage....they have the longer fins and dorsel spikes, but are remaining in the female coloration.
Hey Alfie how places are you living in..LOL .....feel better my friend and hope to see you at NERAC.