5-15 metres. Caves with various entries and exits. Can be a bit exposed in swells and strong winds but a really nice dive.
Source: DIVE New Zealand magazine.

Aquatic Life:

Untold invertebrate life inside the caves, including sponges anemones and nudibranchs. Black angelfish are common and red, painted and blue moki are all seen. Occasional rock lobster in the rear of the caves and cracks along with yellow moray and conger eels.

Directions:

Northwest corner of Hongiora (Flat) Island, Alderman Islands