One of the most common things people do is provide fish with proper landscapes.
Psychologically, fish need the sense of safety and security. Wide open spaces tend to stress fish and force them into hiding behind the smallest spaces. ( Not always tho.)
Its actually oppsosite of what we think, that is, the more places you give your fish to hide, the less the actually will hide cuz the feel safe. They don't have to travel far to get into cover, should they become intimidated. Perhaps you could put in a few logs, caves, and perhaps some peices of coral or plastic plants.
Not that your fish doesn't look good, but you may be surprised in the changes that take place.
Godd luck
Exodon