I stick a piece of plexi glass in between me and my fish when hes really mad. Usually I don't have to because hes more interested in attacking my siphon tube but he will come at my hand every 30 or seconds, you just have to be quicker than the fish. I think I've hurt myself more times pulling my hand out of the water real fast and scraping it on the trim than hes bit me.
Liz what kind of pets do you keep? I have 1 cockatiel, 2 dogs, a cat, 2 iguanas (rescued from stupid people), 3 guinea pigs, 1 gerbil, a bullfrog ($4.99 at a asian food market), and currently I have 13 tanks setup which total 715gallons. Tried to bring back a softshell turtle for $10 last time I was at the food market but my girlfriend wouldn't let me.
Makes me sad that people can buy live stuff like this to eat. They also have live eels, crabs, koi, sunfish, bass, and monsterously sized tilapia which sucks, but the turtles and bullfrogs always piss me off.