So far my blue tang still the boss, being the most senior resident close to 2 years..but he's quite a tame boss..will go scare scare new comer awhile n swim his own way..the other more terror is my yellow tang but being smaller, so shd not pose any threat..my vlamingi tang is a hungry fish always, only interested in food..hope this sohal being just arrive to AC ytd nite will stay with me long..finger crossed