aggresive

[rucus]

Get a payara! They are awesome. Will do ok in that tank. It's what I would get if I was looking for a fish like that.

 

[killerfish]

I agree I'm not saying don't feed them the food they should eat. What I am saying is if all you are looking for is a fish to kill things for your personal sadistic enjoyment its just morally wrong.

we'll thats not really what i had in mind i was more thinking of a cool predator thats fun to keep hopefully colorful and is aggressive a better word for what i'm looking for is interactive i suppose

The reason i said rip other fish apart is because to due so it would need big teeth which would look cool i wouldn't throw other fish in with it to get torn up just a fish that could tear stuff apart would look cool

 

[groovitudedude]

Fahaka Puffer

 

[coreyweinkoetz]

Balistapus undulatus the undulated trigger this guy fits all your discriptions interactive bold beauitful tuff as a coffin nail the best bet fresh or salt and they stay under 12in