Also curious what Nick did. When we lived in KW sometimes people would get bit by nurse sharks. They are harmless and tourist were told this and not to worry about them. Believing they wouldn't get bit they would yank on the tails when found hanging out under a ledge. Dumb, dumb people. No respect for them.
They all can bite except for the whale shark that is a filter feeder. I try not to mess around with any animal under water that has any potential to cause me harm. You're just too far from real emergency care if something goes wrong. Heck, I had a small chunk taken out of the plam of my hand by a tiny reef octopus I was putting back in the water after finding it in a shell up on the beach, ungrateful little so and so! ;Nurse