I guess i got the one super agro White Tail Bristle Tooth. I just finished a 30 day QT copper-general cure treatment for a few tangs including a yellow. I just added them to my display and the White Tail is wet ******* and beating my Yellow Tang to the point he looks tired and pale. I did not expect this. Live and learn. I am over feeding and have a mirror up now so he can bang on the glass instead of on my Yellow. Worse comes to worse I will acclimation box the yellow as he is sitting in the top of the water column and i think i can catch him. Anyway wanted you to know that White Tails can be jerks too. Maybe I will buy one of those plastic yellow tang dummies. Anyway cheers! Zag