Meet the site
Castle Rock is one of the named reef sites off Mooloolaba. GoodDive describes it as a 21 m dive featuring a 'large rock overhang covered in orange coral', with surgeonfish, batfish, trevally, crayfish, nudibranchs and turtles; Scuba Diver Life lists it among the named sites of the Inner and Outer Gneering and Murphy's reef systems. The overhang, lined with orange sun corals, is the centrepiece and makes a good photographic subject, while the crayfish use the shaded recesses beneath it.
Like the other named sites off Mooloolaba, it sits on the Gneering Shoals reef system, which Scuba Diver Life describes as gutters, ledges, caves and pinnacles with coral gardens in 8-33 m, and Scuba World summarises its reef sites as mostly 15-20 m (range 12-35 m, average 18 m) with 'incredible macro life'. The rock is covered in a subtropical mix of algae, sponges, ascidians, soft corals and scattered hard corals. Typical residents across these reefs include butterflyfish, angelfish, wrasse, morwong, surgeonfish, moray eels, wobbegongs, turtles and rays, with some of the highest nudibranch diversity in Queensland; leopard sharks visit in summer and grey nurse sharks and humpback whales in winter.
Scuba World Mooloolaba includes the site in the rotation for its reef double dives, which run about 15-30 minutes from The Wharf and are chosen on the day according to swell, wind and current. Visibility is typically 8-15 m, best in winter after southerly winds. Mooloolaba operators confirm trips by email or text around 3.30 pm the day before, depending on sea conditions, and plan local reef dives to about 50 minutes or 50 bar, whichever comes first, with the surface interval spent on the boat. Open Water certification is the usual minimum for the reef sites.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Castle Rock is recorded as Reef in Sunshine Coast. The listed access is boat. Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- Lines and obstructions
- Discuss any known entanglement concerns and the suitability of the planned area.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is Castle Rock suitable for my certification?
The record lists Advanced Open Water. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book Castle Rock through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Orange sun corals, surgeonfish, batfish, trevally, crayfish, nudibranchs, turtles, wobbegongs, moray eels
Location
Named Mooloolaba reef site with a large overhang covered in orange sun corals, to about 21 m.
Facilities nearby
Departure: The Wharf, Mooloolaba
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
gooddive.comscubadiverlife.comRecord updated 26 Sept 2026. Source claims are being reviewed.