I saw a burr fish (AKA Spiny Box Puffer) last night at the hidden reef in Philadelpiha. I have a 150 gallon tank with a lion, harlequin tusk, picasso and (mild mannered) clown trigger. I asked the store attendant about this fish and he told me that burr fish are meak and wouldn't be able to live in this tank. I've done some research today online and have found that he is supposed to be aggresive. I am wondering if anyone on this board has a burr puffer or knows enough about them to help me make a desicion.