upside down gramma

[Scavenger]

I am curious about the swimming upside down you described. If the fish is swimming with his belly toward the nearest structure. ie rock, sand, glass etc. THIS IS NORMAL behaviour for a gramma. My gramma would only swim "upright" in the open areas of the tank for the most part. When close to a rock or any other object, it would aline it's belly to that object. I suspect it's due to their tendency to hang out in caves, arches etc.