My sailfin tang has been chasing around a new foxface since yesterday. I'm used to it giving new arrivals the gears but the foxface has stung the sailfin twice and it continues to attack it. Will this aggression subside or should I be concerned for the sailfin tang's health? Its odd it didn't learn its lesson after being stung twice now, it has 2 marks where it was stung just from last night.