What have you been bitten by (as far as aquatic inhabitants)? Myself a 10" hungry Gar, drew a fair amount of blood, avoided going to the ER. Had someone I know that was bitten by a 10-12" Red Snakehead, did quite a number on him, but no ER...
never been to the hospital for any kind of bite, but I've been bitten by my 8" male trimac, a 9" oscar I used to have and several 3" frontosas. the trimac hurt the most but it didn't draw blood.
I know a guy who came home from the bars at college one night. His buddy dared him to try to catch his RBP with his hand. Needless to say, he was in no state to use good judgement and followed through with the bet. The RBP was pretty big. Long story short, he woke up the next morning with 6 stitches in his hand - Won $20 though... I'm sure getting the stitches cost a lot more.
No personal experiences (Momma didn't raise no fool)
But i was at my buddies house when he was removing live rock from his 150 saltwater tank it was too cloudy to see and he grabbed a 3-1/2 foot green moray eel instead of rock. Well it was more like the eel grabbed his finger.. cut him on the inside of his middle finger from the base to the last knuckle almost to the bone.
From this story you can tell this friend is not the most mentally stable individual so he never went to a doctor just cleaned it out real well and bandaged it up. It healed pretty well just a scar to remember the story.
I had a green sevrum that would attack my hand or arm every time I put it in my tank. Thats not as bad as some of the other people though. I haven't been stung by me stingray and nor do I plan on being stung.
i have been bitten by my big aro no damage just a love bite, but one time when i was hand feeding my target puffer the little bastard bit the end of my finger off almost to the bone there was blood everywhere but no hospital i dont like them it healed after awhile and left no scar