I just got back from the LFS a couple of hours ago. I bought a naso tang to see if it can help me take care of an unidentified algae problem. Given that there are no known chemical solutions to my algae problem at this point, I thought I would give the naso a try. The unanticipated problem is what turns out to be a very aggressive adult bumblebee chromis. (I bought a fish trap for the exclusive purpose of trapping the bumblebee and executing him at my first chance!!!) The bumblebee is about 1-1.5" compared to about 4" for the naso. All of this in a 90 gallon aquarium with a lot of rock work. The bumblebee keeps taking shots at the side of the naso. The naso is hiding in the rockwork and I have turned out all of the lights except for the moonglows. How capable is the naso of defending itself? Apparently it was the bumblebee that killed my tomini a few weeks ago.