Turnbull's Gut
Swim through a dramatic coral fissure at the edge of the Tongue of the Ocean and emerge at 120 feet with nothing but 6,000 feet of blue beneath you.
Turnbull's Gut is one of the most celebrated wall dives along the Andros Barrier Reef, named for resident marine biologist Tim Turnbull who spent years studying the reef ecosystem. The site features a dramatic natural fissure in the coral running along the very edge of the Tongue of the Ocean, creating a swim-through experience unlike any other in the Bahamas.
Divers enter the coral passage at the top of the wall and navigate through a tunnel surrounded on all sides by living reef. The swim-through exits at approximately 120 feet, where the vertical wall drops into the abyss of the Tongue of the Ocean. The sensation of emerging from enclosed coral into open water with thousands of feet of nothing below is both exhilarating and humbling.
The Swim-Through Experience
The fissure that defines Turnbull's Gut runs along the reef edge where the barrier meets the deep water canyon. Entering from the shallow reef side, divers descend into a coral-walled passage where hard and soft corals encrust every surface. Natural light filters through cracks above, creating shifting patterns as divers progress through the gut.
The passage is wide enough for comfortable navigation but enclosed enough to create true immersion in the reef structure. Schools of small tropicals shelter within, and the occasional nurse shark may be spotted resting in the deeper recesses. The exit opens dramatically onto the vertical wall face.
Wall Environment
Beyond the swim-through, the wall of the Tongue of the Ocean plunges vertically into indigo depths. Large barrel sponges, sea fans, and black coral adorn the wall face, while pelagic species patrol the edge where reef meets open ocean. Caribbean reef sharks frequently cruise the wall, drawn by the deep water access.
Visibility at the wall typically exceeds 100 feet, allowing divers to appreciate the scale of this underwater cliff. Looking down from the exit point reveals nothing but gradients of blue fading to black, a humbling reminder of the 6,000-foot trench below.
Diving Requirements
Turnbull's Gut is best suited for experienced divers comfortable with depths beyond 100 feet and swim-through environments. Advanced Open Water certification or equivalent is recommended, along with demonstrated buoyancy control. The swim-through portion requires awareness of overhead environments, though it remains an open cavern with visible ambient light throughout.
Dive operators from Small Hope Bay Lodge and other Central Andros outfits run regular trips to this site when conditions permit. Morning dives often offer the calmest seas and best visibility.
Getting there
Turnbull's Gut is accessed by dive boat from Small Hope Bay Lodge or other Central Andros dive operations near Fresh Creek. The site lies along the barrier reef edge, approximately 10 to 15 minutes offshore. Divers fly into Andros Town Airport via connecting flights from Nassau or Marsh Harbour, then arrange ground transfers to their dive resort. Small Hope Bay Lodge offers all-inclusive dive packages with daily boat trips to the wall and other sites along the 124-mile Andros Barrier Reef.
Frequently asked questions
- How difficult is the swim-through at Turnbull's Gut?
- The swim-through is a wide coral fissure with ambient light throughout, making it more of an open cavern than a true overhead environment. However, the depth at the exit (120 feet) and enclosed nature require good buoyancy control and comfort with confined spaces. It is not suitable for new divers.
- What marine life will I see?
- Inside the swim-through, expect small tropical reef fish, occasional nurse sharks resting in recesses, and abundant coral growth. On the wall, Caribbean reef sharks, eagle rays, large groupers, and schools of jacks are common sightings.
- What certification do I need?
- Advanced Open Water or equivalent is recommended due to the depth and swim-through nature of the dive. Some operators may accept Open Water certified divers with documented deep dive experience and demonstrated buoyancy skills.
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