Meet the site
Black Rock Shoal is a low sandstone reef sitting on the sand plain a kilometre or so off Black Rock, between Half Moon Bay and the Ricketts Point Marine Sanctuary. It is one of a handful of natural offshore reefs on the inner eastern shore and, being out of reach of shore divers, it sees far less traffic than the sanctuary reefs inshore. The shoal rises from about 10 m on the surrounding sand to within 3 m of the surface, with a broken top, short ledges and undercuts around its margin and patches of kelp and mixed brown algae on the crest. The fish life is the same suite found at Ricketts Point but bigger and less shy: snapper, dusky morwong, magpie perch, zebrafish, old wives, leatherjackets, moonlighters and blue-throat wrasse, with Port Jackson sharks resting under the ledges in winter, smooth stingrays and eagle rays on the sand and the usual sea stars, urchins and nudibranchs on the rock. Cuttlefish are regular in spring. Because it is a small isolated structure it concentrates life, and because it is a little deeper than anything reachable from the beach it is a useful step-up dive for new divers from a club boat. Documentation is thin; The Scuba Doctor lists the mark with coordinates and a 3-10 m range but no narrative, and the description here is built from that listing and the adjacent sanctuary reefs. Treat it as a pleasant, easy small-boat dive for a calm day rather than a destination.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Black Rock Shoal is recorded as Reef in Melbourne & Port Phillip Bay. 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.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
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 Black Rock Shoal suitable for my certification?
The record lists 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 Black Rock Shoal 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
Snapper, dusky morwong, magpie perch, zebrafish, old wives, leatherjackets, moonlighters, blue-throat wrasse, Port Jackson sharks, smooth stingrays, eagle rays, cuttlefish, sea stars, urchins, nudibranchs
Location
Offshore rock shoal about 1 km south-west of Half Moon Bay and 850 m west-north-west of Quiet Corner, off Black Rock on the eastern shore of Port Phillip.
Facilities nearby
Half Moon Bay public boat ramp (small metered car park); Sandringham and Mordialloc ramps as alternatives
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
scubadoctor.com.auscubadoctor.com.auRecord updated 26 Sept 2026. Source claims are being reviewed.
