Having an octopus, or secondary demand valve, is a universal standard dive practice among modern divers. A spare regulator can act as a secondary air source for a friend in need. We have comfortable and functional octopuses for your diving pleasure. Always be prepared to help your dive buddy with an octopus from LeisurePro. We carry the top industry brands such as Mares, Oceanic, Aqualung and more. Don't go scuba diving without it!