|Title||Mask of Water Breathing|
|Powers||Lets user breathe only water|
|Bearers||The Toa Mata (formerly)|
- Toa Mata Tahu - Former secondary mask; exchanged for a Golden Kanohi
- Toa Mata Gali - Former primary mask; exchanged for a Golden Kanohi
- Toa Mata Lewa - Former secondary mask; exchanged for a Golden Kanohi
- Toa Mata Pohatu - Former secondary mask; exchanged for a Golden Kanohi
- Toa Mata Onua - Former secondary mask; exchanged for a Golden Kanohi
- Toa Mata Kopaka - Former secondary mask; exchanged for a Golden Kanohi
- A Toa Mangai of Ice (deceased)
- Hahli - Formerly; given to Karzahni upon entrance to his realm.
- Kivi - On Mata Nui
- Nuhrii - On Mata Nui
- Gavla - As an Av-Matoran; switched to a Noble Avsa while a Shadow Matoran, but has since switched back
The Kanohi Kaukau was first released in the color translucent blue with the 2001 Gali set. It was also possible to receive a Kanohi Kaukau in a mask pack in 2001. Translucent green, red, orange (in lieu of brown), blue, white, black were available in the mask pack. Yellow and light blue Kanohi Kaukau were also released, but these were misprints.
In 2002, a Krana pack was released that contained three Krana and two Kanohi of either silver or gold color. The Kanohi Kaukau was one of six masks available as such.
Included in the Hahli set of 2003 was a transparent blue Kanohi Kaukau.
- Before it was destroyed by the Bohrok, Naho Falls had a large Kanohi Kaukau statue.
- The Kanohi Kaukau was the only of the Toa Mata's Kanohi to have its design computer generated by set designers. The other five were done by carvings.
|Legendary||Ignika | Vahi | Mask of Creation|
|Great/Noble||Hau | Kaukau | Miru | Kakama | Pakari | Akaku | Aki | Rua|
Huna | Rau | Mahiki | Komau | Ruru | Matatu
Calix | Elda | Suletu | Sanok | Kadin | Iden
Arthron | Faxon | Zatth | Garai | Volitak | Tryna
Jutlin | Avsa | Felnas | Mohtrek | Shelek | Crast | Mask of Mutation | Mask of Scavenging
Pehkui | Mask of Clairvoyance | Kualsi | Mask of Emulation | Mask of Growth | Mask of Rahi Control
Avohkii | Kraahkan | Mask of Light and Shadow
Mask of Psychometry | Rode | Olmak | Mask of Charisma
Olisi | Kiril | Mask of Intangibility | Mask of Possibilities | Mask of Elemental Energy
|Nuva||Hau Nuva | Kaukau Nuva | Miru Nuva | Kakama Nuva | Pakari Nuva | Akaku Nuva | Aki Nuva | Rua Nuva|
|Others||Golden Kanohi | Infected Kanohi | Mask of Victory | Other Kanohi|
|Characters | Sapient Species | Locations | Flora | Creatures | Rahi | Objects | Powers | Vehicles | Society | Events|
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