Little Halls is a small reef just inside Laguna Bay near the Noosa River mouth. The Noosa kayak-fishing community lists its mark as 26°21.341'S 153°05.026'E, and Deep Sea Fishing Co groups it with Halls Reef, noting depths of about 15-20 m for the Halls reefs and the benefit of bait flushed from the river.

No dive-specific description has been published. It is best thought of as a small, low-profile rocky reef used mostly by fishers, with the subtropical reef fish, soft corals and sponges typical of Laguna Bay. Its position close to the river mouth means visibility is closely tied to tide and rainfall: after heavy rain the Noosa River plume can reduce it to a few metres, while a flood tide on a dry, calm day brings clearer ocean water in.

The depth is not documented for this reef specifically. As with Halls Reef, it may be one of the unnamed 'other local reefs' that SubSurface Scuba includes on its Noosa triple-dive trips.

Its main attraction is convenience: it is minutes from the bar for anyone with their own boat or kayak. Watch out for boat traffic around the river mouth and the Noosa bar, and expect anglers on the reef. Divers who want to try it should sound the reef first to establish its depth and extent, and treat the first visit as an exploratory dive.

Noosa's reefs are reached by boat. SubSurface Scuba runs Jew Shoal double and triple dives (about 20 minutes' boat ride to the shoal). Private boats launch at the Noosa River ramps (Noosaville/Munna Point or Tewantin) and must cross the Noosa River bar at the river mouth beside Noosa Heads – a shallow, shifting bar that is hazardous in any swell and best crossed on a rising tide in daylight.

Little Halls lies close to the river mouth at 26°21.341'S 153°05.026'E (Noosa kayak fishers' mark) – only a few minutes by boat from the bar. Anchor in sand off the reef.

Laguna Bay faces north and is sheltered by the Noosa headland from south-easterly winds and swell, which is why the inshore Noosa reefs are often diveable when the rest of the Sunshine Coast is blown out. North-easterly and northerly winds and swell, common on summer afternoons, make the bay choppy and surge over the shallow reef. The Noosa River bar closes in moderate swell.

Visibility is typically 8-15 m and drops after rain because of the Noosa River plume, particularly on the ebb tide – dive on the flood. Winter (May-October) brings clearer water and occasional grey nurse sharks and mantas; summer is warmer with leopard sharks.

Anchor off the reef, descend and follow the reef edge in a loop back to the anchor. Dive on the flood tide and on calm days.

No regular dive operator documented – private boat or kayak divers.