Yes, he does hang upside down.I bought him some fake plants,he sometimes hangs amongst those,mostly he chills and sometimes watches T.V or the cat(he sits in front of the tank @ watches the fish).He's about 1 1/2 ft now @ we house he/she in a 300+ fowlr.It's deminsions are 3x3x8.All the rock is placed against the back of the tank, he has swimming room 2@ can turn around.