Ouch! I'm glad to see that you didn't lose any fingers.
I haven't gotten any 'battle scars' from my fishtanks yet, but I'm sure I will as my crays grow up...or even from the convicts, maybe? lol
I'm guessing you must have yanked your hand out of the water right away, so probably you didn't really bleed into the tank? (BV picturing turbulent water, cloudy with blood, as Karma enters into a voracious feeding frenzy)
Nice to know that this is now 'water under the bridge' and you two have found a way to get along (i.e. putting him in bucket while working on the tank).
BV