Fishing for ( and filleting) giant piranhas is quite a lesson on how tough these carnivorous fish can be.
This fisherman caught one nasty piranha and was bitten in the process of filleting his catch.
This piranha bit a big chunk of this guy's finger almost clean off through gloves.
When fishing for piranhas, an angler must be careful where his hands go.
If you're dealing with toothy fish, make sure you watch where you put your hands. Your fingers may just depend on it.