Ceduna is the last sizeable town before the Nullarbor, set on the sheltered waters of Murat Bay. The Marine Life Society describes its old jetty as an easy, shallow dive day or night, with some debris on the bottom, and lists garfish, Australian salmon, snook and tommy ruff among the fish. The debris – decades of lost fishing gear, old jetty timbers and bits of hardware – has become habitat for crabs, small octopus, gobies and blennies, while the piles carry algae, sponges and ascidians.

Squid gather under the lights after dark, and blue swimmer crabs and stingarees work the sand and seagrass. Ceduna is also known for its oysters, and the wider bay supports a productive seagrass ecosystem. The jetty is an ideal easy dive for travellers crossing the Nullarbor or visiting Ceduna to dive the Eleni K.

Its shallow depth and sheltered position make it suitable for beginners, snorkellers and night divers. Services in Ceduna are good, but there is no dive shop, so bring full cylinders. Data confidence is moderate-to-low, based on a single published description.

Ceduna is about 780 km (8.5 hours) from Adelaide via the Eyre Highway, with flights available. The old jetty is on the Ceduna foreshore off O'Loughlin Terrace in the town centre. Park at the foreshore and enter via the jetty steps or the beach.

The jetty is a short walk from cafes and accommodation. There is no dive shop in Ceduna, so bring full cylinders; the nearest air is several hundred kilometres away.

The west coast of Eyre Peninsula faces the Great Australian Bight and receives almost constant south-westerly Southern Ocean swell; open-coast sites need swell under about 1.5 m and are only diveable a handful of days a month, usually after several days of northerly or easterly winds, which blow offshore. The large sheltered bays (Coffin Bay, Waterloo Bay, Venus Bay, Baird Bay, Streaky Bay, Denial Bay) are protected from swell and can be dived in most conditions except strong onshore winds. Summer brings strong afternoon south-easterly sea breezes; winter brings cold fronts with big swell but also calm, clear spells.

Water is cool: about 14-15°C in winter and 17-21°C in summer.

Swim out along the jetty, search the debris and pile bases for small life, and return; squid at night.

No operator; visiting divers.