My puffer and triggers (well now only one) will come bite my fingers if I do not let the food go quickly enough or they think I am feeding. It does not hurt though. Just shocks me a bit. My clowns, well, clowns are what they are. Bad to the bone territorial. I did get stung by my rabbitfish the other day. I was transporting it to qt and it jumped out of the bucket, spines out, right in the thumb near the nail bed. Great aim. I yelled a lot for 45 minutes. Hot water is a savior for those stings.