i had a spotted puffer once, and somehow he got a little peice of plastic stuck in his mouth. i didnt really know what ot do, so i left him alone for a little bit to see if he could spit it out, but he couldnt. he just kept swimmin up and down the side of the tank lookin at me like he wanted help so i netted him and picked him up and pulled it out for him. it had gotten stuck in his little buckteeth, and he didnt try to get away from me when i touched him, he didnt puff up or anything, he acted like he knew i was helping and he turned out just fine