Twin Bommies

Bommie Dive | Boat access

Depth: 12 m (39 ft) to 18 m (59 ft)

Port Jackson Sharks at Twin Bommies
© Ian Scholey

Twin Bommies (aka Twin Towers Reef) is exactly as its name would suggest, two large rock Bommies standing up from the 18-metre seabed just off Point Lonsdale outside of Port Phillip Heads in Bass Strait. The Bommies have a large community of fish life and are covered in bright soft corals and sponges. A great dive with lots of photo opportunities, not to mention the odd Port Jackson Shark, or a Southern Rock Lobster (aka Crayfish) or two.

Bass Strait Warning: Always keep an eye on sea conditions throughout any shore or boat dive in Bass Strait on Victoria's coastline. Please read the warnings on the web page diving-in-bass-strait before diving or snorkelling this site.

Crayfish Dive Site | © Ian Scholey

Divers have the opportunity to catch Southern Rock Lobster (aka Crayfish) at this dive site. Remember your catch bag, current Victorian Recreational Fishing Licence, rock lobster measure, and cray tags. Once you get back to the dive boat, or shore, make sure you clip the tail and tag your Crayfish as per Fisheries requirements. Please abide by all current fishing regulations if you intend to catch crays. See article-catching-crayfish for practical cray hunting advice from The Scuba Doctor, plus melbourne-cray-dives for a list of other crayfish dive sites near Melbourne. For tips on cooking your Crays, please see article-cooking-crayfish.

Mystery Twin Bommies GPS Mark

We have another GPS Mark for the Twin Bommies east of Castle Rock.

Source: Dive Victoria:
Latitude: 38° 17.902′ S (38.29836667° S / 38° 17′ 54.12″ S)
Longitude: 144° 36.052′ E (144.6008667° E / 144° 36′ 3.12″ E)
856 m, bearing 277°, W

It would be interesting for someone to check it out and report back to us what, if anything, is there.

Wathaurong (Wadda-Warrung) country

Traditional Owners — This dive site is in the traditional Country of the Wathaurong (Wadda-Warrung) people of the Kulin Nation. This truly ancient Country includes the coastline of Port Phillip, from the Werribee River in the north-east, the Bellarine Peninsula, and down to Cape Otway in the south-west. We wish to acknowledge the Wathaurong as Traditional Owners. We pay respect to their Ancestors and their Elders, past, present and emerging. We acknowledge Bunjil the Creator Spirit of this beautiful land, who travels as an eagle, and Waarn, who protects the waterways and travels as a crow, and thank them for continuing to watch over this Country today and beyond.

Twin Bommies Location Map

Latitude: 38° 17.965′ S (38.299417° S / 38° 17′ 57.9″ S)
Longitude: 144° 36.635′ E (144.610583° E / 144° 36′ 38.1″ E)
Datum: WGS84 | Google Map
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-04-06 18:20:49 GMT
Source: GPS
Nearest Neighbour: Lonsdale Arches, 83 m, bearing 237°, WSW
Depth: 12 to 18 m.
Dive only on: Ebb.

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DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.