Blushing...

This fish cruising in a tidal pool had cheeks which turned yellow when another fish swam by. I am not sure if they were two male fish and it was a sign of aggression marking territory. Or if they were two female fish and it was also a sign of aggression marking territory. Or if it was a female fish making her face pretty to attract a male which swam by. Or if it was a male fish blushing yellow out of embarrassment when a pretty lady swam by and smiled at him. That sometimes happens to me. Or so I have been told. But I blush red not yellow. I will never understand fish behavior. I can barely understand my own behavior...