I got what was supposed to be a breeding trio of pseudotropheus flavus awhile ago. They are all yellowish brown in colour so I assume they are females. Once in awhile they'll get black striping but only when chasing eachother but then it goes back to yellowish brown. So my question is, should the males hold their pattern all the time or does it come and go? The 3 I have are 3-4" in size and I would assume by that size they should show their colour by now.