I had a green BTA. I left for Winter Break to find it split not once but twice so I had three that wandered and wiped out ALL my sps as they moved from one spot to another. By the time I got back all I had left in my 100 gallon was my torch, cyanarina, fish and three large green RBTA's. Needless to say the RBTA is gone and my sps frags I purchased to replace my others are doing nicely and growing.