i have two of them one is 4 inches and the other is 2 and a half. the larger one keeps digging holes in the gravel and moving rocks clear across the tank. i was just wondering if this was some type of breeding behavior or something?
yup, most cichlids dig and it is usually in preparation for breeding. egg layers will often lay the eggs on a flat surface, but then move the fry once they're hatched to the pit they've dug. mouthbrooders I believe dig the pits for the female to lay the eggs in before scooping them up in her mouth.