What would be some good choices for a 55 gallon predator tank. I am really interested in very aggressive carnovores like large cichlids or any other large predator fish I could keep in the 55 gallon. Help greatly appreciated.
Bichirs aren't really that agressive. I think that there really aren't that many that will fit what your looking for. I think the best thing you could get would be a smallish pike like a johanna or a jack dempsey. That is all I can really think of.