Meet the site
Watanabe Bommie is a deep pinnacle in the Flinders Reefs, about 250 km off the Queensland coast. Marinelife.org.au describes it as an office-block-sized pinnacle with a depth range of 12–40 m, covered in soft corals, gorgonians and sea whips, and surrounded by schools of pelagic fish and sharks. The name's origin is not documented in the sources consulted.
The top of the bommie lies at about 12 m, so there is no shallow reef to linger on, and the structure falls steeply to around 40 m. Its sheer size gives it the presence of a building in the blue. Soft corals in reds, pinks and purples cover much of the surface, gorgonian fans spread across the current, and sea whips extend from the walls. Visibility in the Flinders area often exceeds 40 m, so the whole structure can sometimes be seen from above.
Isolated pinnacles in open water concentrate life, and Watanabe is no exception. Schools of trevally, barracuda, fusiliers and snapper circle the bommie, and grey reef, whitetip and silvertip sharks patrol. Cruising the Edge, describing Flinders more generally, lists tiger sharks, tawny nurse sharks and yellowfin and dogtooth tuna, so larger visitors are possible.
The dive suits advanced divers comfortable with depth, open-water descents and ascents, and possible current. The top at 12 m means most of the dive is spent below 15 m, so gas and no-decompression limits need watching; nitrox helps. Flinders is visited by Mike Ball only a few times a year, and Watanabe Bommie is one of the dives that justifies the long crossing.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Watanabe Bommie (Flinders Reef) is recorded as Pinnacle/Bommie in Coral Sea. The listed access is boat (multi-day/liveaboard). 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.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
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 Watanabe Bommie (Flinders Reef) suitable for my certification?
The record lists Deep/Advanced + experience. 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 Watanabe Bommie (Flinders 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
Soft corals, gorgonians, sea whips, trevally, barracuda, fusiliers, snapper, grey reef, whitetip and silvertip sharks; possible tiger sharks and tuna
Location
A deep, office-block-sized pinnacle rising from about 40 m to 12 m in the Flinders Reefs, Coral Sea.
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.aucruisingtheedge.comen.wikipedia.orgaustralianmarineparks.gov.auRecord updated 27 Sept 2026. Source claims are being reviewed.
