This dive site is a spectacular limestone reef system off Rottnest Island, famous for its intricate caves, large swim-throughs, and dramatic ledges. The complex topography creates a stunning underwater landscape and provides shelter for a high diversity of marine life. It is particularly renowned as a winter aggregation site for Grey Nurse Sharks.
North Lump
Deep limestone reef with caves, swim-throughs, and nurse sharks.
Boat Access
24m Avg Depth
32m Max Depth
About this dive site
Diving
Site Ratings
Big Marine Life Very Good
Macro Marine Life Very Good
Landscape Quality Excellent
Water Visibility Very Good Viz
Plan Your Visit
sharkcavernswim-throughwall diveadvanced onlyboat divewide angleaustraliaperth
Marine Life
Sponge
Nurse Shark
Western Rock Lobster
Soft Gingerbread Hem Star
Bullseye
Western Blue Devil
Nudibranch
Harlequin Fish
Things to Note
Difficulty:
Advanced
Deep profile (30m+), potential strong currents, and overhead environments.
Hazards:
currentdepthoverhead environmentsboat traffic
Current Strength:
Variable
Nearby Dive Sites
Explore other dive sites in the area
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Shallow shore dive famous for its leafy seadragons.
Australia, Perth Marmion Marine Park
Limestone pinnacle with caves, swim-throughs, and diverse marine life.
Australia, Perth Rottnest Island Marine Reserve
Limestone reef with spectacular caves and swim-throughs off Perth.