Ahh I am frustrated from my undulate triggerfish now. I was so lucky that it want to suicide by jumping on carpet but I saved it. It killed my tangs and i decided to remove it. I hv donated it 6 times and every time it comes back to me. This time it had came back and I hv placed it in a 40 gallons tank where it is alone. This time it is itching and destroying rocks(actually freshwater dacor). What should I do with it? It also had a cloth piece on it's tail but how can I remove? It really wants kill me when I put my hands inside the tank. It was my biggest mistake. My lfs told me that it will be fine with tangs and Google also showed that. Unlucky!