My Regal Tang must ride the shortbus to fish school

[Mrfish55]

Thats funny, my Sailfin must have OCD as he does something similar but only for 10 min just before lights out, try covering that side of the tank and see if he stops, might be something he sees out the side that makes him do it, my tangs in the FOWLR are allways pressed up against the glass staring at the reef accross the room, must be something tasty they see over there.