These are the different colorations you may find on the Sergeant Major. The dark phase seen at the upper right corner is seen when the fish is guarding a patch of eggs they may have attached to a rock. Photo credit - © ReefNet Software
This juvenile can be seen at the Jetties of Fort Pickens on Santa Rosa Island. These fish in larval stages settle on shallow, protected areas to develop into large juveniles. Later they will move to reef areasnd lay eggs of their own.
Photo credit - © Scott Chandler