This happened to Norman and I in Jamaica. We were on a night dive, just us and the master. Master and I came up first with our lights on and hit a swarm. The dive master got it the worst and incurred an injury much like Elberts, mine were minor on my arms- Norm's lucky no stings. The dive master said either Vinegar (which they had in the boat) or urine will do the trick, I think Norm would have preferred to pee on me wink