BBs, can be one of the most aggressive Vieja, especially in a small tank (for large active fish like them) such as a 90. Unless it is a 6 ft 90.
They usually don't tolerate other cichlids in small tanks, but "non"-cichlids are sometimes given a pass.
Here in Central America maculacauda can sometimes be found grazing marine algae lust off shore in the ocean and though they are omnivorous, they have a definite tendency to eat fruit and veggies, and are found under overhanging fig trees waiting for ripe fruit to fall.
Don't let the vegetarian side fool you though, they can be tough very aggressive fish.