Kaukau

The Kanohi Kaukau is the mask of underwater breathing. It allows the user to breath underwater up to a certain depth. The Kaukau Nuva allows the user to extend the depth at which this mask would work, and allows the user to share the powers with others.

Tahu, Onua, Pohatu, Kopaka, and Lewa all found Great Kaukau masks, but lost them when they became Toa Nuva.

Known Wearers

 * Gali (Great, but lost after becoming a Toa Nuva
 * Hahli (Great but powerless, lost at Karzahni where it was replaced with an Elda)
 * Nurhii (Great, but powerless)
 * Kivi (Great, but powerless)

Nuva
it can possibly be made from the great Ga-Metru disk