Kaukau Nuva

The Kanohi Kaukau Nuva was the Kanohi Nuva Mask of Water Breathing.It is created when a Kaukau is exposed to Energized Protodermis. Like all Kanohi Nuva, it could only be used by Toa Nuva. It enabled the wearer to breathe underwater indefinitely, even at extreme depths.

Users

 * Gali Nuva - Main mask [[Image:Kaukaunuva.png|thumb|right|Gali's original Kaukau Nuva.]]
 * Tahu Nuva - Formerly; destroyed during the sinking of Ta-Koro.
 * Pohatu Nuva - Not worn regularly
 * Onua Nuva - Not worn regularly
 * Lewa Nuva - Not worn regularly
 * Kopaka Nuva - Not worn regularly