Meet the site
The Shark is Rottnest's other WA Museum-recommended snorkel wreck and one of the most photographed. She was a steel hopper barge (a dredge spoil barge) that broke free from her moorings at Fremantle and drifted across to Rottnest, grounding on Henrietta Rocks in 1939 (1938 in some sources). She has remained there ever since, and parts of the hull still break the surface, making her easy to find.
The wreck sits in about 2-4 m on a mix of reef and sand just off the beach below Lookout Hill. The broken plates and frames have become an artificial reef colonised by weed and small invertebrates, with wrasse, juvenile bream, sweep and small reef fish sheltering inside. The surrounding limestone reef and seagrass add to the interest, and SeaLink describes the site as an 'underwater playground' for snorkellers.
This is a snorkel for calm days rather than a scuba destination: it is very shallow, visibility is moderate and surge quickly makes the jagged metal dangerous. The Museum recommends a shirt or wetsuit top and even garden gloves for protection. It suits families, confident beginner snorkellers and cyclists doing the island loop, and it is often combined with Parker Point and Little Salmon Bay further along the south coast. Protected under heritage legislation; do not climb on or remove anything. Scuba adds little except longer time in the water, and gear has to be carried on a bike or bus, so most divers snorkel it. Arrive early in summer, when the beach fills by late morning, and check the wind the night before: a south-easterly change can make the site unusable within an hour. Rottnest Island Authority lists it first among its six best snorkel spots.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Shark Hopper Barge (Henrietta Rocks) is recorded as Wreck in Rottnest Island. The listed access is shore. 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.
- 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 Shark Hopper Barge (Henrietta Rocks) suitable for my certification?
The record lists Snorkel/Any. 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 Shark Hopper Barge (Henrietta Rocks) 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
Western king wrasse, juvenile buffalo bream, sweep, blennies, sea urchins, weed and encrusting invertebrates, occasional stingrays on the sand
Location
Steel hopper barge wrecked on Henrietta Rocks below Lookout Hill on Rottnest's south-east coast, partly visible above water and a short swim from the beach.
Facilities nearby
Bike racks and Island Explorer Stop 3; no toilets at the beach - nearest in Thomson Bay settlement or at Parker Point/Salmon Bay; snorkel hire in the settlement.
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
museum.wa.gov.audivingwawrecks.comrottnestisland.comrottnestisland.comsealink.com.auRecord updated 27 Sept 2026. Source claims are being reviewed.