Mindbenders Reef is a deep reef listed by the Marine Life Network for Ulladulla, with a depth of about 31 m and a GPS mark south-east of Warden Head. The description is brief: a reef packed with deep-reef species including sea fans, sponges and sea whips. That fits the pattern of Ulladulla's deeper offshore reefs such as The Hole, where the lack of light at 30 m removes most of the kelp and leaves rock surfaces covered in filter-feeding animals.

At these depths expect gorgonian sea fans in yellow, orange and red, erect and encrusting sponges, sea whips, black coral in places, sea squirts, hydroids and bryozoans. Fish include schools of yellowtail and silver sweep, bastard (Tasmanian) trumpeter, nannygai and red morwong, with eastern blue devilfish and wobbegongs among the rock. Pelagic fish such as kingfish and bonito pass through in summer.

Because the whole dive is at about 30 m, this is a site for experienced deep divers with good gas planning. On air, no-decompression time is short, so nitrox or decompression training is useful. The name suggests narcosis at depth was on someone's mind. There is no detailed published layout, so plan an exploratory dive close to the anchor line. Divers who visit should record the position, layout and conditions, because a proper description of the reef would be a useful addition to the regional record, and should check the site with the Ulladulla shop before planning a trip around it.

Boat access only. Charters and private boats launch from the public ramp inside Ulladulla Harbour, reached off the Princes Highway in the centre of Ulladulla (about three hours' drive south of Sydney); there is trailer parking around the harbour and the dive shop is a short walk away. The Marine Life Network mark (35°22.39'S 150°29.67'E) places the reef about 1.5 km south-south-east of the Ulladulla Lighthouse, a run of around 10 minutes.

Use the sounder to find the reef at about 31 m and anchor on rock.

An offshore reef at 30 m or so, exposed to all swell directions. It is below the surge, but anchoring in 30 m and recovering divers requires light winds and swell under about 1.5 m. Current is more common here than on the inshore reefs, so carry an SMB.

Deeper water often has better visibility than inshore, though winter plankton and runoff after rain can reduce it.

Descend the line directly onto the reef, keep within a short radius of the anchor and plan for a no-decompression bottom time of about 12–15 minutes on air. Ascend on the line with a safety stop.

Nitrox (EAN28) useful; plan for a short no-deco dive on air or a planned deco dive with appropriate training and gas.

Listed by the Marine Life Network (Sea-Search) for Ulladulla; not on Dive Adventures Ulladulla's public site list, so dived mainly by experienced private boat groups or by arrangement with the shop.