Meet the site
Long Island in the Wallabi Group is where the Batavia mutineers were tried and most were hanged in October 1629 – it is sometimes called Gallows Island. Underwater, Marine Life Network highlights it as an example of the Abrolhos overlap zone: tropical staghorn corals alongside temperate fish such as buffalo bream and baldchin groper, reached from a public mooring.
The shallow reef suits snorkellers and relaxed dives, and the historical association makes it a meaningful stop on a Batavia-themed itinerary that also includes the Batavia wreck site, Beacon Island and the West Wallabi forts. Little further dive detail has been published.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Long Island (Wallabi Group) is recorded as Island in Geraldton & Abrolhos Islands. 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.
- 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 Long Island (Wallabi Group) 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 Long Island (Wallabi Group) 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
Staghorn corals, buffalo bream, baldchin groper, sergeant majors, wrasse, parrotfish
Location
Island in the Wallabi Group with a public mooring and reef where tropical staghorn corals overlap with temperate fish; the site of the Batavia mutineers' executions in 1629.
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.audivingwawrecks.comRecord updated 26 Sept 2026. Source claims are being reviewed.