Meet the site
Trap Reef is a pinnacle and reef system just outside Bicheno's harbour, north of Governor Island. Its top sits at about 13 m and it is cut by kelp-covered gutters that deepen from 17 m to 21 m and reach the sand at around 29 m, with the deepest parts of the site close to 35 m. Scuba Chronicles notes that surf breaks over the reef in any swell, reaching several metres, which gives the site its name.
Michael McFadyen's dive in the north gutter found a reef covered in kelp, as with most Tasmanian sites, with scattered sponges and small gorgonians on the walls. The Combined Clubs guide adds finger sponges, ascidians and bryozoans. Fish life is good: bastard trumpeter, yellowtail, seapike, wrasse, leatherjackets, banded morwong, old wives and long-snouted boarfish, plus resident magpie perch and butterfly perch. Yellow sea spiders and yellow nudibranchs are common on the kelp.
The site is structured around its gutters, which make navigation simple and give a pleasant sense of swimming along narrow canyons with walls of kelp. There are also swim-throughs and overhangs along the sea floor. It is less colourful than the deep Governor Island sites but has more fish, and it is often chosen when the Governor Island walls are affected by surge.
Trap Reef suits Advanced Open Water divers and is a good second or third dive. Visibility can be lower than on the eastern side of the island, as McFadyen found on a flat-calm February day with 10 m visibility.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Trap Reef is recorded as Pinnacle/Bommie in Tasmania East Coast. The listed access is boat (day trip). 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.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
- 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 Trap 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 Trap 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
Bastard trumpeter, yellowtail, seapike, wrasse, leatherjackets, banded morwong, old wife, long-snouted boarfish, magpie perch, butterfly perch, finger sponges, small gorgonians, ascidians, bryozoans, yellow sea spiders, yellow nudibranchs, kelp
Location
A reef and pinnacle west of the protective rocks near Bicheno harbour and north of Governor Island, with kelp-filled gutters.
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
michaelmcfadyenscuba.infoccwtasmania.comscubachronicles.wordpress.comRecord updated 27 Sept 2026. Source claims are being reviewed.