You have your idiot right here. I was working in a store called Sand Castle Aquarium and scooped a 6" black volitan for a customer when it jumped as I was flipping the net and two spines caught my thumb. I finished bagging up the fish, and two seconds later felt like I got hit with a bullet. I had to take some serious benedryl and lots of hot water. I had tried sucking the poison out at first, but all I managed was to remove the spines. Took like a week or two to fully heal, it was around 13 years ago this happend.
*(Funny aside - my buddy John at the store got stung a week before and was really f-ed up from it, but that lion was HUGE, he was cleaning a tank and got careless. I guess Karma's a *****, because I was riding him all week on it)
Rabbit fish hurt, but I thought the lion was much worse for me. The rabbit stung for most of the day, when I mentioned it to the boss, he was surprised I didn't know about them beforehand.
One of the worst things I always thought were plecos and cory cats, those little bastards stuck me constantly and always got infected.