Hi everyone. I just want to let you know my thoughts on puffers puffing. I realize that puffing might cause the fish alittle stress but I think it is blown way out of proportion. A puffer puffing is nature's way of giving it some defense. That is why they are called puffers. It is natures way of keeping the puffer alive. If it so dangerous and stressful for the fish to puff, there would be alot of dead puffers in the water especially if it is attacked by a predator which gives it more stress. Also, in the wild, when a puffer puffs, its natural habitat is not as stable as in your fish tank so puffers in home aquariums have a better advantage. For example, when a porcupine is attacked, it usually runs backwards towards it's enemy to attack it with its quills. The quills are actually attatched to its body but it still lives even though the quills are attatched to its skin when they are pulled out. To make a long story short, a puffer fish is made to puff when attacked or harrassed otherwise they would be called 1 puff puffers. Hope I didn't offend anyone, The Doctor