There is a lot that goes into a cichlid being shy or outgoing. Decor, light, tankmates, size, etc.
Is this a small fish in a 125 gallon tank alone? What is the tank setup like, can you post a picture? Small cichlids tend to be shy to avoid being eaten by birds, They don't know there are no herons in your living room. If they all swam up to the surface at a small size, they wouldn't last long in the wild. African cichlids you mentioned; they usually are not kept solo, and small cichlids will be a lot less scared if there are others in the tank. Also overhanging decor and things to hide under that are in the upper reaches, go a long way. If there is nothing in the upper half of the tank, the fish will feel like a sitting duck. Once they are full grown adults they tend to not care as much about these things, but at a small size especially, they do.