Dive Site: Ribbon Reef No. 9

About Ribbon Reef No. 9

Ribbon Reef No. 9, nestled within Australia's iconic Great Barrier Reef, stands as a premier diving destination, particularly celebrated for its 'Cod Hole' where large, friendly potato cod interact readily with divers. This section of the Ribbon Reefs, stretching north from Cooktown towards Lizard Island, showcases a thriving ecosystem that has made a remarkable recovery from past cyclone impacts, now boasting abundant new coral growth across its shallow ridges. Divers will discover an array of vibrant Acropora corals in diverse colours and forms, alongside impressive hard coral formations. The topography of Ribbon Reef No. 9 includes bommies and coral gardens that descend to depths frequented by large aggregations of fish. While some areas have experienced natural disturbances, the resilience of the reef is evident in the flourishing populations of marine species. The site is characterized by relatively shallow depths compared to the Coral Sea, typically ranging from 15 to 30 meters, making it accessible for various dive levels. However, strong currents can occasionally be present. Marine life here is prolific and varied. Beyond the resident potato cod, divers can anticipate sightings of grey reef sharks, white-tip reef sharks, and schools of bumphead parrotfish. Seasonal visitors enhance the experience, with minke whales present from June to July and manta rays commonly observed between April and October. The cooler, drier months generally offer the best visibility and conditions for encountering these migratory species. Diving Ribbon Reef No. 9 often involves drift dives or guided explorations around its unique bommies and coral formations. Liveaboard trips typically combine this site with other notable locations in the Ribbon Reefs and Coral Sea, providing a comprehensive experience of this ecologically rich region. The emphasis here is on observing natural marine behaviours in a protected environment.

Dive site facts: Ribbon Reef No. 9

Depth

15–30 m (50–100 ft)

Typical dive

12–25 m, 50–60 min

Current

Moderate to strong, tidal dependent

Visibility

13–40 m

Water temperature

24–29°C

Entry

Liveaboard tender / negative entry

Level

Advanced Open Water recommended, current experience beneficial

Dive type

Reef, pelagic, macro, drift

Night dive

Possible

Region / port

Great Barrier Reef, Queensland

Coordinates

-14.7333, 145.6667

Conditions & Currents

Currents at Ribbon Reef No. 9 can vary from moderate to strong, influenced by tidal flows which can exhibit significant daily ranges up to 2.86 meters. Divers should be prepared for potential drift diving conditions, particularly around bommies and channels where water movement can accelerate. Visibility generally remains excellent, often exceeding 13 nautical miles on calm days, although strong winds can stir up particulate matter. Water temperatures are comfortable, ranging from 24°C in winter to 29°C in summer, mitigating concerns about thermoclines. Entry and exit strategies are typically managed from liveaboards, often involving tender transfers or negative entries to quickly reach the desired depth and minimize surface drift in stronger currents. Constant awareness of bottom time and gas consumption is crucial due to the potential for vigorous currents and the desire to maximize en

Marine life & sighting chances

Potato cod

common

Pygmy seahorse

occasional

Grey reef shark

occasional

White-tip reef shark

occasional

Dwarf minke whale

June–July · occasional

Manta ray

April–October · occasional

Bumphead parrotfish

occasional

Diagonal-lined sweetlip

Spring · occasional

Queensland grouper

Spring–Summer · occasional

Sailfin snapper

Spring–Summer · occasional

Camouflage grouper

Spring–Summer · occasional

Loggerhead turtle

occasional

Giant clam

common

Anemonefish

common

Dive profile & how the dive runs

A typical dive at Ribbon Reef No. 9's 'Cod Hole' begins with a tender drop-off, often involving a negative entry to reach the main bommie quickly. The dive then proceeds around the large coral head, descending to depths around 15 to 25 meters where the impressive potato cod are frequently encountered. Divers can explore the reef structure, observing abundant coral recovery and searching for smaller macro life. The route often involves circumnavigating the bommie, ascending gradually towards the shallower reef flats where anemonefish and various reef fish reside. Pay close attention to current direction, as conditions can dictate a drift profile. The dive concludes with a safety stop in the shallower, protected areas of the reef before surfacing for tender pickup.

Underwater photography

Ribbon Reef No. 9 presents excellent photographic opportunities, especially for wide-angle shots of the large potato cod. An 8mm-15mm lens is ideal for capturing these charismatic subjects as they approach divers. Be mindful of the bright white sand, which can lead to overexposure; using strobes at low power is recommended to prevent blown-out highlights and minimize backscatter, especially if other divers stir up sediment. For macro enthusiasts, the site offers pygmy seahorses, nudibranchs, scorpionfish, and pipefish, requiring a macro lens and careful buoyancy control. When photographing the potato cod, ensure strobes are positioned wide and behind the lens to mitigate scatter in the water column. Consider dedicating specific dives to wide-angle or macro, optimizing lens choices for the conditions and marine life encountered.

Combine with nearby dive sites

• Cod Hole

  Famous for large, friendly potato cod encounters.

• Steve's Bommie

  Renowned for its vibrant pinnacle and diverse marine life.

• Pixie Pinnacle

  Another iconic bommie in the Ribbon Reefs with rich coral and fish life.

Getting there & logistics

Access to Ribbon Reef No. 9 typically begins with flights into Cairns Airport (CNS), the closest major hub for the Great Barrier Reef's northern sector. From Cairns, liveaboard dive expeditions depart, offering multi-day trips that explore the Ribbon Reefs and often extend into the Coral Sea. These trips usually range from 3 to 7 nights, combining various dive sites for a comprehensive experience. No specific individual permits are required for divers beyond what is arranged by the liveaboard operator, but all activities are subject to the regulations of the Great Barrier Reef Marine Park Authority. Liveaboards provide the most practical way to reach this remote site, offering comfortable accommodation, meals, and multiple dives per day, allowing divers to immerse themselves fully in the region's diverse underwater environment without daily transfers from the mainland.

Safety & environment

Diving at Ribbon Reef No. 9 requires adherence to standard dive safety protocols and awareness of remote area considerations. The nearest recompression chamber is located in Townsville, underscoring the importance of conservative dive planning and careful depth/bottom time management. Evacuation in case of a medical emergency would involve a significant time delay and potentially complex logistics via air or sea, emphasizing the critical need for comprehensive dive insurance that covers emergency medical evacuation and treatment. Site-specific hazards include variable currents, which necessitate good buoyancy control and buddy awareness. Stinger suits are recommended during the stinger season (November-May) to protect against venomous jellyfish. Always dive with a reputable operator, follow your dive guide's instructions, and never feed fish unless authorized by licensed tour operators.

Who it suits — and who it doesn't

FAQ

Ribbon Reef No. 9 FAQ

Liveaboards diving Ribbon Reef No. 9

These liveaboards may visit Ribbon Reef No. 9 on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Spoilsport

Australia

28 guests30 m

$406/day

Odyssey Liveaboard

Australia

20 guests24 m

$392/day