Aqua Lung offer several types of Octopus 2nd stages to meet the varying needs of divers.

A mid-sized, feature-rich alternate air source
 

Diver-controlled Venturi Adjustment Switch (VAS) reduces sensitivity to free flow on the surface and provides maximum airflow at depth
 

Equipped with Aqua Lung's exclusive Comfo-Bite™ mouthpiece
 

Equipped with 39-inch yellow hose for visibility