One day you are going to stick your hand in there for maintenance and that puffer is going to take a finger off!!Most of my fish bite/nip at me - pair of semilarvatus butterflies, moorish idol, dogface puffer, pair of tinkeri butterflies, goldflake angel, even my regal angel. It's my fault though since I feed them by hand quite often. They mainly bite/nip because they think my fingers/hand/arm are food, not because they are being territorial.
