Pirahanas for my fish tank
 

So I need a little excitement in my house when I'm bored. Anyone bought Pirahanas online or know a good place to get them? Or what other type of fish are aggressive?

pirahna are cool! go get some, but don't forget: do not put your fingers in the fish tank! :)

just don't flush them down the toilet

Pirahnas are not agressive at all. They get agressive when they are REALLY hungry. I've swam between pirahnas. As long there's enough food in the water
they will NOT attack/feed on humans. In fact they don't like human flesh.
If they are REALLY hungry they'll just eat anything including their own.

:2 cents:

They also get aggressive when there's blood in the water, regardless of being hungry or not. Regardless, kudos to you for having the cojones to swim among them, I certainly would've stayed dry.