+1How about some super aggressive fish such as armatus, african tiger fish, or wolf fish
My armatus i have found is more interesting than my motoro stingray! Half of the fun for me is preparing the food.
After 5 years of keeping fish, working my way up from a tiny 7 gallon now up to a 135, I've had a decent amount of fish and will admit I have occasionally gotten bored of the hobby and thought of getting out, but never could. I've found my white tip wolf to be one of my favorites. If hoplias malabaricus were legal in California, I would get one in an instant. I don't have tank space for other legal hoplias species so I settled for an erythrinus and I love him. Very active, eats anything, he's like a mini monster, I would definitely recommend one.