I do succeed in using my mask power to allow my friends to breathe water. When the flood tide subsides, Icarax is gone and the Toa Nuva, somehow, survive.

Gali, Toa Nuva Blog

Kaukau Nuva
Nuva Mask of Water Breathing
Power(s)Gave user(s) enhanced Water Breathing
Notable Wearer(s)The Toa Nuva
PronunciationCOW-COW NOO-vah

The Kaukau Nuva was the Kanohi Nuva Mask of Water Breathing, formed when a destined Kanohi Kaukau was exposed to Energized Protodermis and transformed. The Kaukau Nuva gave its user and those nearby the power to breathe underwater for an indefinite amount of time, even at extreme depths. The Kaukau Nuva's power could have been used to suffocate opponents via sharing its power, but Toa considered that to be an immoral application. The only beings able to activate this mask's power were Toa Nuva.

Example Usage

In the Toa Nuva Blog, Gali used her Kaukau Nuva to give herself and the other Toa Nuva the ability to breathe water and survive immense water pressures after she was released a Water Nova Blast in Karzahni.

Known Wearers


A swamp-adapted Kaukau Nuva

  • The Toa Nuva
    • Tahu Nuva - Former secondary mask, destroyed after the sinking of Ta-Koro.
    • Gali Nuva - Primary mask
    • Lewa Nuva - Secondary mask
    • Pohatu Nuva - Secondary mask
    • Onua Nuva - Secondary mask
    • Kopaka Nuva - Secondary mask
Legendary Kanohi
VahiIgnikaMask of Creation
Great/Noble Kanohi
Toa Mata HauKaukauMiruKakamaPakariAkaku (AkiRua)
Toa Metru HunaRauMahikiKomauRuruMatatu
Toa Inika CalixEldaSuletuSanokKadinIden
Toa Mahri ArthronFaxonZatthGaraiVolitakTryna
Toa Hagah PehkuiMask of ClairvoyanceKualsiMask of EmulationMask of GrowthMask of Rahi Control
Karda Nui Makuta JutlinAvsaFelnasMohtrekShelekCrast
Other Kanohi Infected KanohiGolden KanohiCopper Mask of VictoryMask of Elemental Energy
AvohkiiKraahkanMask of Light and ShadowKirilOlisiRodeOlmak
Mask of IntangibilityMask of PossibilitiesMask of Psychometry
Mask of MutationMask of CharismaMask of HealingMask of Scavenging
Mask of AdaptationMask of AgingMask of Biomechanics
Mask of ConjuringMask of FusionMask of Incomprehension
Mask of ReboundingMask of Sensory AptitudeMask of Undeath
Kanohi Nuva
Toa Nuva Hau NuvaKaukau NuvaMiru NuvaKakama NuvaPakari NuvaAkaku Nuva (Aki NuvaRua Nuva)
KanohiKranaKanohi NuvaKrana-KalKraataKanokaRhotukaZamor SpheresSquidsGolden Armor
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