The dorsal spines of Paracanthurus hepatus are venomous, and I would think that the first few anal spines are also. I have handled quite a few of these fish in the past and have been stuck by blue tang on a few occasions. It doesnt hurt as bad as a Volitan sp. lionfish, but feels more like a small coral catfish sting, painful but bearable. Running your hand under the hottest water you can stand for 15 minutes will help whenever you are stung by a venomous fish. Use caution when netting these fish.