It is within the Whirinaki Te Pua-a-Tāne Conservation Park, south and can be accessed via a 6-kilometre (3.7 mi) walking track.

[1] The Ngāti Whare Claims Settlement Act 2012 changed the name of the lagoon from Arahaki to Arohaki.

It is seasonally used as a mahinga manu (bird gathering place), and the fish in the lagoon were used as a food source.

[3] Arohaki Lagoon contains kōkopu (native galaxiid fish), and serves as a sanctuary and breeding ground for various bird species.

[1] The lagoon contains a large population of water brome (Amphibromus fluitans), a threatened species of native grass.