Dive Site: Alcatraz

About Alcatraz

Alcatraz is a renowned dive site in Alor, celebrated for its unique underwater garden of pink soft coral trees that stretch several meters high from the sandy seabed. It presents a dramatic near-vertical wall plunging into deeper waters, creating an impressive backdrop for exploration. The site is characterized by an abundance of marine life, thriving within a diverse ecosystem. Divers typically explore depths between 12 to 30 meters along the reef's edge. The wall itself is richly populated with sponges, black coral bushes, sea whips, and massive gorgonian fans, which sway gracefully in the varying currents. This blend of geological features and vibrant sessile life contributes to its captivating environment. Visibility at Alcatraz is consistently excellent, often ranging from 20 to 30 meters, allowing for clear views of the intricate coral details and active marine inhabitants. While drift diving along the reef, you can observe large schools of damselfish and anthias, alongside pelagic species like barracuda and jacks that frequently patrol the area. The combination of its topography, rich biodiversity, and clear waters makes Alcatraz a memorable Alor diving experience. The Alor archipelago, situated between the Indian and Pacific Oceans, benefits from immense tidal exchanges that funnel nutrient-rich waters through narrow volcanic channels, fostering one of Indonesia's most productive marine ecosystems. This unique geography ensures a wide array of underwater habitats, from vibrant coral gardens and dramatic walls to exciting drift dives, all within relatively short cruising distances.

Dive site facts: Alcatraz

Depth

12–30 m

Current

Mild

Visibility

20–30 m

Water temperature

25–30°C (can drop to 15°C)

Entry

Boat

Level

Intermediate

Dive type

Wall, soft coral garden

Region / port

Alor

Coordinates

8.4629° S, 124.0308° E

Conditions & Currents

Currents at Alcatraz are generally described as mild, however, divers should anticipate varying conditions as they drift along the reef’s edge. The Alor region experiences immense tidal exchanges between the Indian and Pacific Oceans, which can generate strong currents at certain sites, making flexibility in dive planning essential. While Alcatraz itself isn't noted for extreme currents, being prepared for potential drifts is advisable, particularly for intermediate divers. Visibility typically remains excellent, ranging from 20 to 30 meters, providing clear views even with water movement. Water temperatures range from 25 to 30°C, though cold upwellings and thermoclines are common in the broader Alor area, occasionally dropping to 15°C, so a 3mm or 5mm wetsuit is recommended. Entry is typically by boat, allowing for optimal positioning relative to the current.

Marine life & sighting chances

Pink soft corals

common

Damselfish

common

Anthias

common

Sponges

common

Black coral bushes

common

Sea whips

common

Gorgonian fans

common

Barracuda

occasional

Jacks

occasional

Dive profile & how the dive runs

Your dive at Alcatraz typically begins with a boat entry, positioning you directly along the vibrant wall. The dive plan usually involves drifting along the reef's edge, allowing you to observe the sprawling pink soft coral gardens that rise from the sandy bottom, as well as the diverse life clinging to the near-vertical drop-off. Depths commonly range from 12 to 30 meters, depending on the chosen route and the experience level of the divers. You'll spend time exploring the various sponges, black coral bushes, sea whips, and massive gorgonian fans that adorn the wall, keeping an eye out for schools of reef fish and patrolling pelagics. The turn point is often dictated by current conditions or air consumption. The safety stop is generally conducted in shallower sections of the reef, providing an opportunity for further observation of the rich marine life before surfacing for a boat exit.

Underwater photography

Alcatraz is an excellent site for wide-angle photography, especially to capture the extensive pink soft coral gardens and the dramatic wall topography. A fisheye lens will effectively convey the scale of the coral formations and the near-vertical drop-off. For reefscapes, consider using strobes to bring out the vibrant colors of the corals and reef fish, ensuring even lighting across the frame. When focusing on the schooling damselfish and anthias, patience and proper strobe positioning can minimize backscatter. While macro opportunities exist among the corals and sponges, the site's highlight leans towards wider scenes and the interplay of light and color on the vast reef. Maintain excellent buoyancy control to avoid damaging the delicate coral trees and to achieve stable shots in mild currents.

Combine with nearby dive sites

• Kalabahi Bay

  A prime location for muck diving and macro photography

• Biatabang

  Also known as 'The Hanging Gardens of Babylon' with rich soft corals

• Kal's Dream

  Known for near-vertical walls, drift dives, and diverse schooling fish

• Current Alley

  Potential for hammerhead shark sightings and powerful currents

Getting there & logistics

Access to Alcatraz is typically facilitated by liveaboard cruises or local dive operators based in Alor, often departing from Kalabahi. The main airport serving Alor is Mali Airport (ARD), usually reached via connecting flights from larger Indonesian hubs like Bali (DPS) or Kupang (KOE). Liveaboard trips in Alor often span 8 to 12 nights, allowing for comprehensive exploration of the archipelago's diverse dive sites. Permits and park fees are generally included in liveaboard packages or arranged by local dive centers. Alor itineraries are designed to maximize diving according to tides and currents, ensuring the best conditions for each site. This site is frequently combined with other Alor highlights such as muck dives in Kalabahi Bay and wall dives around Pura Island or Pantar Island.

Safety & environment

Diving at Alcatraz requires adherence to standard safe diving practices, especially given the potential for varying currents. Divers should always carry a surface marker buoy (SMB) for safe ascent and surface communication, particularly if drift diving is involved. Emergency evacuation from Alor can be complex and lengthy, often involving boat transfers followed by domestic flights to a major medical facility with recompression chambers, such as those in Bali or Makassar. Therefore, comprehensive dive accident insurance is not just recommended but essential for any diver exploring this remote region. Divers should always follow their guide's instructions regarding entry, exit, and dive profiles. While the site is generally considered intermediate, an AOWD certification and some current experience are beneficial.

Who it suits — and who it doesn't

FAQ

Alcatraz FAQ

Liveaboards diving Alcatraz

These liveaboards may visit Alcatraz 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

$547/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