Dive Site: Pasir Merah

About Pasir Merah

Pasir Merah, or Red Sand, is a distinctive dive site situated north of Pura Island in the Alor Archipelago, East Nusa Tenggara. It is characterized by its volcanic red sandy slopes that descend to approximately 35 meters, creating an unusual and visually striking underwater environment. A unique feature of this site are the bubbling gas vents that emanate from Gunung Maru's volcanic system, permeating the seabed and adding to its singular character. The topography transitions from these red sandy slopes to a wall, supporting a diverse ecosystem. The unique substrate and warm waters rising from Alor's volcanic seabed create conditions that foster a rich variety of marine life, making it a macro diving haven. Divers can explore small coral bommies that serve as cleaning stations and offer shelter for various critters. While predominantly known for its macro inhabitants, the site also offers encounters with specific shark species. The combination of a vibrant critter scene against an otherworldly volcanic landscape makes Pasir Merah a memorable experience. It's often compared to world-renowned muck diving locations due to its exceptional critter encounters.

Dive site facts: Pasir Merah

Depth

5–35 m

Typical dive

18–30 m, 50–60 min

Current

Variable (mild to moderate)

Visibility

18–30 m

Water temperature

28°C

Entry

Day boat / Liveaboard

Level

Intermediate

Dive type

Muck, macro, volcanic slope

Region / port

Alor Archipelago

Coordinates

8.3190° S, 124.3877° E

Conditions & Currents

Currents at Pasir Merah can vary from mild to moderate, depending on the day and tidal conditions. While generally manageable, divers should be prepared for potential shifts. Visibility at the site is typically good, ranging from 18 to 30 meters, which allows for clear observation of the unique volcanic landscape and its inhabitants. The water temperature averages around 28°C, providing comfortable diving conditions. Occasional cold-water upwellings or thermoclines are not specifically noted for this site but can occur in the wider Alor region. Entry is typically by boat, allowing divers to be dropped directly onto the site. Given its reputation for macro life, divers often move slowly along the sandy slopes, requiring good buoyancy control to avoid disturbing the delicate environment and stirring up the volcanic sand.

Marine life & sighting chances

Mandarin fish

common

Nurse shark

occasional

Bamboo shark

occasional

Frogfish

common

Scorpionfish

common

Octopus

common

Ribbon eel

common

Leaf fish

common

Commensal shrimp

common

Porcelain crab

common

Hermit crab

common

Nudibranch

common

Hairy shrimp

occasional

Dive profile & how the dive runs

Dives at Pasir Merah typically begin with a boat drop directly onto the volcanic red sandy slope, which descends to depths of 35 meters. Divers will explore the unique substrate, focusing on the small coral bommies and volcanic features that punctuate the sand. The route generally follows the contours of the slope, allowing ample time to search for camouflaged macro life such as frogfish, scorpionfish, and various species of octopus, which blend seamlessly with the reddish terrain. Keep an eye out for ribbon eels, leaf fish, and numerous crabs, often found around the bommies. The dive progresses along the slope, with divers maintaining good buoyancy to avoid disturbing the delicate environment. Towards the shallower areas, around 5-10 meters, mandarin fish may be spotted, particularly during late afternoon or twilight dives. The safety stop is usually conducted over the shallower sections of the slope before ascending to the surface for boat pickup.

Underwater photography

Pasir Merah is a prime location for macro photography, so a macro lens (e.g., 60mm or 100/105mm) is essential to capture the intricate details of its unique critter inhabitants. Its volcanic red sand offers a dramatic, unusual backdrop that really makes subjects pop. Strobes are highly recommended to provide ample light and bring out the true colors of the marine life, especially given the potential for light absorption by the reddish substrate. Snoots can be particularly effective here for isolating subjects like frogfish, ghost pipefish, or nudibranchs against the sandy background. Divers should exercise excellent buoyancy control to avoid stirring up the fine volcanic sand, which can quickly reduce visibility and ruin shots. Patience is key, as many creatures are expertly camouflaged.

Combine with nearby dive sites

• Masjid Ampera

  Also known as Mucky Mosque, another acclaimed macro site

• Goa Wolang

  Wolang Cave, featuring caverns and cool water

• Bama Wall

  A dramatic wall dive exceeding 40 meters

• Biatabang

  Known for large fish and sharks on a deep wall with currents

Getting there & logistics

Access to Pasir Merah is primarily via liveaboard or day boats operating from Alor. The main airport for reaching Alor is Mali Airport (ARD) in Kalabahi, typically requiring a domestic flight from Kupang (KOE) which connects to major Indonesian hubs like Denpasar (DPS) or Jakarta (CGK). Liveaboard trips to Alor often span 7 to 11 days, combining this site with others around Pura, Pantar, and Kalabahi Bay. Day trips are also available from local dive resorts on Alor. No specific marine park fees for Pasir Merah itself were noted, but general Alor Marine Park fees might apply depending on the operator. This site is frequently combined with other muck diving locations in Kalabahi Bay and reef dives around the islands of Pura and Pantar.

Safety & environment

Diving at Pasir Merah requires adherence to standard safety protocols and awareness of site-specific conditions. The nearest recompression chamber is likely in Bali, necessitating comprehensive dive insurance that covers emergency medical evacuation. Evacuation from remote Alor can be complex and time-consuming. Divers must be mindful of the variable currents, which can range from mild to moderate, and adjust dive plans accordingly. Good buoyancy control is crucial to avoid disturbing the volcanic sand and to protect the delicate macro life. While bubbling gas vents are a feature, they are generally not considered a hazard, but divers should avoid direct contact. Always dive with a reputable operator, follow your guide's instructions, and monitor your depth and no-decompression limits, especially when exploring deeper sections of the slope.

Who it suits — and who it doesn't

FAQ

Pasir Merah FAQ

Liveaboards diving Pasir Merah

These liveaboards may visit Pasir Merah on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Naga Biru

Indonesia

12 guests40 m

$273/day

Jaya

Indonesia

14 guests23 m

$280/day

Komodo Aggressor

Komodo, Indonesia

16 guests29 m

$312/day

Blue Manta

Indonesia

20 guests45 m

$488/day

Gaia Love

Alor

20 guests

$554/day

Emperor Raja Laut

Raja Ampat, Indonesia

12 guests31 m

$413/day

Coralia

Indonesia

16 guests48 m

$577/day

Ilike

Indonesia

16 guests40 m

$298/day

Mermaid I

Alor

15 guests28 m

$371/day

Mutiara Laut

Indonesia

14 guests46 m

$741/day

Neptune One

Indonesia

16 guests38 m

$284/day

Dewi Nusantara

Indonesia

18 guests57 m

$493/day