I used to have two male and four female A. agassizii in my 6 foot community tank. They were awesome for about four months. Then the sub-dominant male killed the dominant male, and about a month later I #@*!ed up big time and accidently got some weed kill in the tank and they died.
(note to self...never, ever clean out filters and parts on the front lawn again)
Next month I am buying 2 male and 6 female A. agassizii sp. Rio Tefe from a breeder down south. His current stock of juveniles should be of sexable size in about 3 more weeks.
Mine were never shy. Females would defend thier caves against much larger fish, flirt with the dominant male and chase off the sneaking sub-dominant male. My dominant male was a real looker, and thought every fish in the tank was subserviant to him.
Old, slightly out of focus photo.