Animation 1. QuickTime (trademark) movie based on an the usual view of ammonite anatomy, where the body chamber is completely filled, as proposed by Trueman (1941).

animation 1 

 Animation 2. QuickTime (trademark) movie based on the proposal by Kakabadzé and Sharikadzé (1993) that ammonites may have changed orientation by shifting cameral fluids within the shell. 

animation 2 

 Animation 3. QuickTime (trademark) movie demonstrating the proposal made here that withdrawal or extension of the soft body parts within the living chamber could produce changes in the orientation of the shell. 

animation 3