Leg3nd Octopus

The octopus made to match the Leg3nd, on a yellow hose you find fast

An octopus is a spare second stage on its own hose. If your buddy has an air emergency, they can breathe from it. Aqualung says the Leg3nd Octopus matches the performance of the Leg3nd primary second stage. Its high-visibility yellow hose gives quick identification in an emergency. It is balanced, for smooth and easy breathing at all depths, according to Aqualung, and has a Venturi switch you can work in gloves. Aqualung lists a work of breathing of 0.7 J/L. Designed and made in France.

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  • Authorised dealer · brand warranty

Highlights

A yellow hose that is quick to find

The 1 m hose and the front cover are yellow. Aqualung says the high-visibility yellow hose gives quick identification in an emergency.

Cover channels against free-flow in strong current

Wide radial openings in the cover let water flow sideways over the diaphragm. Aqualung says they prevent free-flow when diving in strong currents and reduce cracking effort by 20%.

A Venturi switch you work in gloves

Set it to MIN for the least assistance and a higher inhalation effort, ideal to avoid free-flow. Set it to MAX for the most assistance and a lower inhalation effort. The overmolded lever works even in gloves.

Balanced, with a heat exchanger

It is balanced, for smooth and easy breathing at all depths, according to Aqualung. A two-material air channel deflector directs the air flow evenly through the second stage and lowers exhalation effort, and a heat exchanger prevents ice forming on the valve inlet. Aqualung lists a work of breathing of 0.7 J/L.

Comfo-Bite mouthpiece and Aqua Flex hose

The Comfo-Bite mouthpiece, patented by Aqualung, has a palate bridge that reduces jaw fatigue and is made of hypoallergenic silicone. It swaps without tools and is held by a reusable clip, for less plastic waste. The overmolded air purge is wide and easy to control, the exhaust cover is soft-touch, and the Aqua Flex hose is flexible and lightweight, with dual protectors.

Who it is for

Great for
  • Leg3nd regulator owners: Aqualung made this octopus to match the Leg3nd primary second stage
  • Divers in strong currents: Aqualung says the cover channels prevent free-flow in strong currents
  • Cold-water divers and divers in gloves: Aqualung marks it for cold and warm water, it has a heat exchanger, and the Venturi switch works in gloves
  • Nitrox divers: Aqualung rates it up to 40% O₂ when new, out of the box (21% in Europe)
Maybe not for
  • Divers looking for a complete regulator: this page is the octopus only, with no first stage. For the full set, see the Leg3nd regulator, or ask us on LINE
  • Divers who want an octopus made for travel: Aqualung does not mark the Leg3nd Octopus for travel, and describes the Helix Compact Pro Octopus as small and compact, for dive trips; ask us on LINE

Specifications

Type
Octopus (alternate second stage), downstream valve, balanced
Venturi switch
MIN (less assistance, helps avoid free-flow) / MAX (more assistance, easier inhalation); overmolded, works in gloves
Cover opening channels
Wide radial openings let water flow sideways over the diaphragm: prevent free-flow in strong current, cracking effort 20% lower
Air channel deflector
Bi-material part spreads the air flow evenly through the second stage, lowers exhalation effort
Heat exchanger
Yes — keeps ice from forming on the valve inlet
Work of breathing
0.7 J/L
Nitrox
Up to 40% O2 when new, out of the box (21% in Europe)
Purge / exhaust
Wide overmolded purge, easy to control; soft-touch overmolded exhaust cover
Mouthpiece
Comfo-Bite (palate bridge, hypoallergenic silicone), swaps without tools; reusable clip
Hose
1 m yellow Aqua Flex hose with dual protectors, yellow front cover
Origin
Designed and made in France
In the box
Leg3nd octopus with a 1 m yellow hose and yellow front cover
Details and specs from the official AQUALUNG website ↗

FAQ

What is an octopus for?

An octopus is a spare second stage on its own hose from your regulator's first stage. If your buddy has an air emergency, they can breathe from it. Aqualung makes the hose high-visibility yellow for quick identification in an emergency.

Which regulator does it go with?

Aqualung made the Leg3nd Octopus to match the Leg3nd primary second stage. This page is the octopus only, with no first stage. Want to check it suits the first stage you use? Ask us on LINE.

How easy is it to breathe?

Aqualung lists a work of breathing of 0.7 J/L. Opening channels in the cover reduce cracking effort by 20%, according to Aqualung, an air channel deflector lowers exhalation effort, and the Venturi switch on MAX lowers inhalation effort.

Can I use it in cold water?

Aqualung marks it for cold and warm water. A heat exchanger prevents ice forming on the valve inlet, and the Venturi switch works in gloves. Planning very cold dives? Ask us on LINE first.

Can I use it with nitrox?

Aqualung lists it as compatible up to 40% O₂ when new, out of the box (21% in Europe). Planning to dive nitrox? Ask us first.

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