My family has a long and storied history of very erratic behaviour on the part of our pets, including my clownfish
I had a 20 gal a while ago, with about 15# of live rock and 2 402's. The clownfish used to spend hours riding the currents (EAC?
) They would swim almost directly in front of the outlet from behind the PH and when in the outflow, surf the current the full length of the tank and around the corner. (the 402 was in one back corner, pointed at the other back corner) Then they would swim the rest of the way around and do it again, for hours on end. I got dizzy just watching them!
They had fun anyways!