Ok so 2 of My OrangeHeads are staying together in one little space in the tank and chase in everyone away from their spot. The two fish are of my Dominant Male and the one the I was unsure of being a sub male or a female. The black bar type marking on my male has gotten bolder. The two fish are moving sand like crazy. They dug out underneath a rock and formed a huge pile of sand. This has been going on now for 2 days. Is this breeding behavior?? I can find too much info on them. They are about 3 inches in size (max being 8 but they grow very slow)