With an octopus you have a backup if your dive partner’s regulator should fail. If he or she uses a Poseidon regulator you should not have any use for the octopus.  We guess you will find that you will be a popular dive buddy as your friends know that you have one of the market’s most reliable and safe octopuses to offer as a backup The octopus is delivered with a 90 cm hose and since it is Poseidon yellow, it is very easy to find.