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World Octopus Day

World Octopus Day
By 10 months ago 2003 Views No comments

October 8 is World Octopus Day. These creatures are one of the oldest, most intelligent and visually stunning. They have cold-adapted blue blood and come in various colors and shapes. If you happen to be diving today, we hope you’ll encounter this extraordinary creature.

As most of you know, one scuba diving equipment piece shares the same name - an alternate second stage air source. The name came from the look the new hose added to others hanging from a diver, giving the vague appearance of an octopus’ arm. This alternate second stage is vital in case of a buddy out-of-air emergency hence it’s an important piece for having a save and enjoyable dive experience.

Let’s talk a bit about scuba octopus.

An alternate second stage does exactly the same thing as a primary second stage - transforms intermediate pressure coming from the first stage into the ambient pressure making it comfortable to breathe. Octopus should be located on the right-hand side somewhere between diver’s chin and lowest part of the rib cage.

Low-Pressure hose is used for air transformation from first stage to second stage. This hose is usually longer than the primary second stage’s hose as out-of-air buddy will be slightly further from the tank. The hose is also designed in bright color, usually yellow, in order to be more visible.

Purge button’s function is to remove any water or any other substance that may have entered into the alternate second stage. The button is also usually of the bright color for easier location.

Mouthpiece is a part that a diver gripes onto with mouth. As a rule, it comes in a standard size so that any diver could use it.

Some octopus models come in with venturi control - a little switch which allows air flow regulation making breathing more or less effortless. It can be labeled with "+/-”, "Dive/Pre-Dive" or "On/Off". In order for the octopus not to free-flow during the dive, the the switch should be put on Pre-Dive mode; the alternate second stage will still work if needed.

As these are pretty standard features, your choice might be based on the look and feel of an octopus as well as its size and weight.

Here are some of the more compact and lightweight (below 500 g) models:

Cressi Compact
Scubapro R195

Aqua Lung Legend
Aqua Lung Legend Octopus
Mares Prestige

Other things to consider when purchasing an octopus should be the environment you plan on diving in - are you going to be diving in warm or cold water (10°C and below)? If cold water is your choice, it’s advised to choose a model designed for cold waters as the probability of octopus to be free-flowing decreases.

Our cold water octopuses recommendations:

Poseidon Xstream Octopus Regulator - Yellow

Some more budget-friendly options:

Apeks XL4 Octopus


Mares Octopus Fusion


For extreme cold water conditions: Mares Octopus Abyss Navy

When looking into buying a full cold water regulator set, our Scubapro bundles are a great option. And they come with a free Scubapro R195 octopus!

Another great option is Aqua Lung Pack Core Supreme DIN 300B incl. Octopus Core

Check out our full octopus selection here.

Purchasing a scuba octopus might seem like an unnecessary expense as you don't use it on every dive, but if you or your buddy do find yourself in an out-of-air situation (which we hope you never will), you will realise how essential this piece of a dive equipment really is.

Which octopus do you use or plan on buying and why?

#gear Posted in: Gear