I think that is their nature and mood; mine are fairly new but they seem to be settling in quite quickly. The aquarium is 8ftx4ft but they stay near the front and when i sprinkle in some algae-max they are quick to eat it so I think they are doing well - not shy at all - they just sink down into the substrate when not eating.Absolutely stunning!
I just picked up 5 of these and hope at least one shows the same pattern as yours! I know they change color but I’m really looking for that rusty red center stripe!View attachment 1532038
I really thought I preferred them with yellow fins but this one with pure white fins looks amazing!