I agree with the Red Bay Snooks, they are a very under rated fish. They get large, have awesome personalities, are very owner responsive, aren't too agressive but can hold their own with alot, are hardy, aren't picky eaters, and they look cool as heck.
bichirs,dats,fire eel,giant bumblebee cat,chaca cat,sun cat,megaladoras,odoe,blackghost knife,royal clown knife,spotted/florida gar,small ray,small to medium snakeheads,pinktailed chalceus the list is almost endless