I was going to say my 14" Butti, but since this is a CA/SA thread I'd say my 4" Sveni, he goes after my 7" Bichir.
This isnt mine but a friends fish.
Mangrove Jack ''Lutjanus Argentimaculatus''
And it is a BEAST
[video=youtube;uYVEV8HB5V8]http://www.youtube.com/watch?v=uYVEV8HB5V8[/video]
Check out Greenterra's Mangrove Jack.
http://www.youtube.com/watch?v=YpnwXhbNhHI&list=UU3FB_GUpuxxE5v8eIVKrgSg&feature=c4-overview
I don't consider Jacks "mean" just food aggressive. Like a Oscar on a bigger and better weaponized fish. You probably know them better than I do, do you think they are mean or just really hungry? I consider "mean" to be a dovii type fish that will simply not allow tank mates, is the jack the same way?

