Meet the site
The Wilson Spit reefs are nine small patches of restored shellfish reef laid on the mud of Corio Bay's outer harbour as part of the same Port Phillip shellfish restoration program that built Moolap Reef 3 km to the west. Each patch is a mound of limestone rubble and recycled shell seeded with hatchery-grown native flat oysters and blue mussels, sitting in 8-9 m of water south of the shipping channel off the Wilson Spit shoal. Individually they are small, a few tens of metres across; together they form a scattered archipelago of hard structure that a diver can hop between on a compass bearing. The point of diving them is ecological rather than scenic. Native shellfish reefs were once the dominant habitat of the bay floor and were dredged to extinction by 1900; watching them come back, with oysters spatting onto the shell, mussels clumping on the rubble and the whole mound greening over with ascidians, sponges, hydroids and algae, is a rare thing to see underwater. Fish move in quickly: snapper, leatherjackets, wrasse, gobies and blennies use the rubble, cuttlefish lay eggs in it in spring, and flathead, rays and the introduced Northern Pacific seastar work the surrounding mud. The reefs are unmarked, unlit and rarely dived except by monitoring teams and the occasional Geelong club boat; they are also fished, so a flag, care with line and a clear view of the shipping channel matter. They are a good flat, shallow second dive after Moolap Reef for a small boat out of Limeburners Point or Point Richards on a still winter morning, and a reminder that some of the most important work in the bay is happening on featureless mud.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Wilson Spit Shellfish Reef is recorded as Artificial Reef in Geelong & Bellarine. 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.
- Lines and obstructions
- Discuss any known entanglement concerns and the suitability of the planned area.
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 Wilson Spit Shellfish Reef 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 Wilson Spit Shellfish Reef 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
Native flat oysters, blue mussels, ascidians, sponges, hydroids, snapper, leatherjackets, wrasse, gobies, blennies, cuttlefish, flathead, rays, Northern Pacific seastar (introduced)
Location
Cluster of nine small restored shellfish reefs on the floor of Corio Bay's outer harbour off Wilson Spit, south of the shipping channel and 3 km east of Moolap Reef, in 8-9 m.
Facilities nearby
Limeburners Point (Geelong), Point Richards (Portarlington), Avalon Beach and Geelong Grammar lagoon boat ramps
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.