I've got a group of 5 julidochromis ornatus which are stocked in my 55G tank along with 12 Cyprichromis leptosoma. One of the ornatus (the largest one, but they are almost all of the same size about 2 in) is very active exploring all the rock work. The other four ornatus keep all together in one corner of the tank away from the the rocks. Now and then the dominant ornatus comes by to harass them. They seem to be fine and are eating regularly. I introduced all fish together a week ago. Is it a common behaviour? Will they be able to settle themselves sooner or later?