Gorgeous C. dimerus. The Port Acaras, genus Cichlasoma, are favorite cichlids of mine. I used to have many of the described and some of the undescribed species, years ago. Currently I'm keeping Cichlasoma dimerus, C. portalegrensis and C. boliviense. You'll enjoy them.
One of the really interesting behaviors they display is their (sometimes) preference for moveable platforms to lay their eggs on. You can provide them with dried leaves, when they are ready to spawn. It's fun to watch them drag the leaf they've laid the eggs on across the tank to a more suitable and in their view, safer location.