Hin Daeng & Hin Muang

Hin Daeng & Hin Muang: Thailand's Pelagic Powerhouse

Prepare for an exhilarating adventure at Hin Daeng ("Red Rock") and Hin Muang ("Purple Rock"), two legendary dive sites nestled in the open Andaman Sea, approximately 70 km offshore from Koh Lanta within the Mu Koh Lanta National Marine Park. These twin pinnacles are renowned as some of Thailand's most dramatic and biodiverse underwater landscapes, offering an unforgettable experience for advanced divers.

The Dive Site

Hin Daeng, meaning "Red Rock," partially breaks the surface, revealing a hint of the vibrant ecosystem below. Its submerged slopes and pinnacles are adorned with stunning red soft corals, creating a vivid backdrop for diverse marine life.

Just a few hundred meters away lies Hin Muang, or "Purple Rock," which remains entirely submerged. This site boasts Thailand's tallest vertical wall, plunging to depths of 70 meters and beyond, carpeted in magnificent purple soft corals, including impressive purple broccoli corals.

Divers will find a rich tapestry of site types here, from pinnacles and walls to dramatic drop-offs and seamounts, all teeming with life.

Diving Conditions & Certification

• Difficulty: Advanced.
• Certification Required: We recommend an Advanced Open Water certification or equivalent experience. Confident Open Water divers may be able to dive here with an instructor and by completing a deep adventure dive.
• Depth: While the sites descend to beyond 60-70 meters, recreational dives typically explore depths between 5 meters and 40 meters, with many highlights found between 18 and 30 meters.
• Current: Divers should be prepared for strong and occasionally unpredictable currents. Solid buoyancy control and drift diving experience are essential for a safe and enjoyable dive.
• Water Temperature: The water temperature generally ranges from 27°C to 30°C throughout the diving season, often warmest between February and April.
• Hazards: The primary hazards are strong currents and depth, necessitating careful dive planning and adherence to training limits.

Marine Life Encounters

Hin Daeng & Hin Muang are legendary for their pelagic encounters, especially during the late-season plankton bloom. Divers will find these sites to be among the most reliable in Thailand for sightings of majestic Giant Oceanic Manta Rays (Mobula birostris) as they circle cleaning stations or feed in the nutrient-rich currents. We also frequently encounter the awe-inspiring Whale Shark (Rhincodon typus), particularly from February to April, and occasionally into May.

Beyond the giants, the reefs are vibrant with life. Look out for Grey Reef Sharks (Carcharhinus amblyrhynchos) patrolling the depths, and Leopard Sharks resting on sandy bottoms. Schools of fusiliers, barracuda, trevally, rainbow runners, and snapper create dazzling displays. Divers will also spot moray eels, lionfish, scorpionfish, unicornfish, angelfish, butterflyfish, and parrotfish among the corals. For those with a keen eye, macro life such as nudibranchs, shrimp, ghost pipefish, and frogfish thrive in sheltered sections.