South Sunk Rock is a thirty meter tall pinnacle rock that reaches the surface during low tide.

South Sunk Rock, although well charted, takes a few by surprise and has the remains of a ship lying at the base on the South end. It breaks the surface at spring low tide and drops off to 28-30m to the sand, so is more suitable for the experienced diver.

South Sunk is well known to be one of the top dives in the area with generally clear water. It is abundant with fish life, which are attracted to the large anemone covered green-lipped mussels near the top. Huge marble fish, hiwihiwi, silver drummers and moki are very territorial here. There are always schools of Jack Mackerel, Sweep and of course heaps of Leather Jackets and with the 20m drop off on the Southern end a huge swim through and a number of crevices, multi colored weeds and fan sponges, nudibranchs can usually be found, this is our top dive. An underwater camera is a great tool here. It is only 5-7 min from Hahei beach.