Hey guys, five days ago I bought a Sapphire damsel for my tank and today a noticed a white mark on him. I haven’t been able to notice because he’s usually facing the other way and hides in the rock work. He might’ve got the mark from my male clown since he would try to attack the damsel for the first few days. I don’t think he’s sick since he’s been getting more active in the tank as the days go by and he eats really well during feeding. Do you guys know what it is?