Meet the site
Mistaken Cape, the easternmost point of Maria Island, is rated 9.5 out of 10 by the Marine Life Network guide, which calls it a real expedition-style dive. The site is a reef about 200 m wide with rock spires in 20-40 m of water and stunning visibility, reached only after a long boat trip from Dunalley or Orford via Darlington.
The guide describes yellow zoanthids covering rock faces up to 15 m high, sea whips, basket stars, hydroids and abalone, with leatherjackets, wrasse and clouds of butterfly perch. That profile - deep granite spires plastered with zoanthids and whips in clear oceanic water - is similar to the best Governor Island sites at Bicheno, but in a far more remote and rarely visited setting.
Maria Island is a national park with no permanent residents apart from rangers, and the Darlington settlement preserves convict-era buildings from 1825 onwards. The marine reserve along the island's northern and western shores has been no-take since 1991 and has been used for long-term studies of how protection affects rock lobster and fish numbers, so reef life inside it is noticeably richer than outside.
Maria Island's boat sites are rarely visited because there is no operator on the island and the eastern coast is a long way from the Triabunna ramp. Visitors with their own boats should carry oxygen and a radio, check the forecast for Mercury Passage as well as the open coast, and remember that the Royal Hobart Hospital chamber is roughly two hours away by road once back at Triabunna.
What you might see
Yellow zoanthids, sea whips, basket stars, hydroids, sponges, butterfly perch, leatherjackets, wrasse, abalone
Location
The easternmost point of Maria Island, with rock spires and a 200 m-wide reef in 20-40 m and exceptional visibility.
Facilities nearby
Darlington: toilets, showers at the Penitentiary accommodation, campground, ranger station, no shop or air fills. Triabunna: ramp, fuel, supermarket, cafes. Nearest air fills in Hobart.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
marinelife.org.auRecord updated 26 Sept 2026. Source claims are being reviewed.
