The Murray Reefs are a long ribbon of limestone reef running parallel to the coast from Mandurah north towards Warnbro Sound, a few kilometres offshore. They have wrecked a number of ships, including the James Service (1878), the Highland Forest (1901) and the Chalmers (1874, on the Sisters at the northern end), and they are also a productive reef dive in their own right.

The Marine Life Network describes the reef as 4–6 m deep, covered in Ecklonia radiata kelp, with overhangs and crevices sheltering gorgonian sea fans and good fish life. Divers find buffalo bream, sweep, wrasse, herring cale, leatherjackets and western rock lobster, with the chance of blue groper and dhufish on the deeper edges. Because the reef sees little diver traffic, fish are relatively unwary.

The reef is exposed, and visibility is poor after heavy weather. The best days come after several days of easterly wind in late summer and autumn.

This is a general record for the reef system, useful for divers with their own boats who want to explore beyond the named wrecks. The Marine Life Network is the only detailed source, so depths and positions should be checked on the sounder before diving.

Mandurah and Port Kennedy are good bases, and the three wrecks give obvious focal points for a two-dive day.

When planning, allow for the run back to the Mandurah entrance channel, which can be rough on the ebb tide against a westerly wind. Small boats should aim to be back inside the estuary before the afternoon sea breeze builds, and should carry a VHF radio and log trips with the local volunteer marine rescue group.

Launch at the Mandurah ramps (Mary Street Lagoon, Dolphin Marina or Mandurah Ocean Marina) for the southern end, or Port Kennedy and Bent Street (Safety Bay) for the northern end, and run a few kilometres offshore to the reef line. Use a sounder to find ledges and anchor in sand. The reef lies several kilometres off the beach, so small boats should watch the swell and afternoon wind.

The reef is quite exposed to south-westerly and westerly swell, which breaks on the shallower sections. Dive when swell is under about 1 m and winds are light, preferably easterly, before the summer sea breeze. Visibility is poor after heavy weather and near the estuary entrance on the ebb tide.

Anchor in sand beside a reef section, descend to 5–8 m and follow the reef edge looking into overhangs and crevices, then return over the kelp-covered top.

No regular operator; private boats and occasional clubs.