I bought this fish in a local store's mixed african tank. It originally was light to med. blue with dark stripes. Approx 4-6 months ago he turned yellow with faded stripes. Is he a male saulosi who reverted to female colors due to being non-dominant. He resides with several red zebras, peacocks, a lab and joanjohnsonae. If not a saulosi, what is he/she? Thanks for your help.