I just added my puffer on Thursday. I beleive that he has already eaten my bristle star since I can find no trace of the star in the last few days. I was told that puffers will eat inverts so I am not surprised, just didn't expect it the first night. Other then that, he is a great fish so far and lots of fun to watch. So far no issues with my clown fish, his only room mate for the time being.