Originally Posted by Koikeeper99
Yeah I'll try and get a pic when he does it its random so it might take a while. I just noticed he does it just before he bolts across the tank.
Yes, this is him flaring his fins, normally they do this when they are scared or are trying tos how another fish to back off. You said he does it right before he darts across the tank? Does it happen when you walk up to the glass or just randomly?