Think from the rock. Wouldn’t expect it from the sand.Ahhh could this be related to the fish making a sand nest? If so what do you think caused it could it be from the sand abasiveness? Or does it look like he hit a rock?
Should be of concern if it’s flashing.has he been flashing allot?
Flashing could happen with water changes to extra slime coat from parasite/infection. There are many things but hard to tell. If it’s occasional then I’d watch it as long as the fish is fine and nothing seen externally.Thanks so much for sharing your knowledge. I have noticed him do that before but not often at all. I was told sometimes fish just do that periodically, is this incorrect? Like if you see the fish do it once in a while does that mean something is definitely wrong or could it by chance just be doing it cause it wants to?