Dive Site: Aliko Reef

About Aliko Reef

Aliko Reef is a prominent dive site within Yap, Micronesia, characterized by a captivating underwater topography that blends a mini-wall with an expansive coral plateau. The mini-wall section ranges from approximately 6 to 15 meters, offering an immediate visual feast upon descent. Beyond the wall, a broad coral plateau gently tapers into deeper waters. The reef boasts an exceptional variety of hard corals, including significant formations of bright green Cabbage Patch Coral and large, house-sized Boulder Star Coral that rise like giant mushrooms. These structures create numerous habitats for a wide array of smaller schooling fish that congregate near the upper edge of the wall. While exploring the plateau, divers frequently encounter white-tip reef sharks, stingrays, and nurse sharks resting within the small, sandy chasms scattered across the seabed. Lionfish are also commonly observed tucked into the crevices along the base of the mini-wall. Typically experienced as a boat dive, Aliko Reef offers a rewarding exploration of its unique coral gardens and diverse marine inhabitants. The dive profile generally involves navigating along the wall and then over the expansive plateau, providing opportunities for both macro observation and encounters with larger pelagic species.

Dive site facts: Aliko Reef

Depth

6–15 m

Current

Mild

Entry

Tender

Level

Intermediate

Dive type

Reef, wall, coral garden, big_animals

Region / port

Yap, Micronesia

Coordinates

7.7903° N, 147.1326° E

Conditions & Currents

Information on specific current strengths and directions for Aliko Reef is not detailed in the sources. However, Yap's dive sites, in general, can experience currents, often leading to enjoyable drift dives. Divers should be prepared for potential currents that might influence entry and exit procedures. Conditions contributing to clear water are often associated with these currents. Visibility in Yap typically ranges from 10 to 30 meters, with consistent water temperatures of 27–30°C.

Marine life & sighting chances

White-tip reef shark

occasional

Stingray

occasional

Nurse shark

occasional

Lionfish

occasional

Dive profile & how the dive runs

Aliko Reef begins with a mini-wall that extends from 6 to 15 meters. Divers typically descend along this wall, observing the variety of hard corals and schooling smaller fish near its upper edge. The dive then progresses over a broad coral plateau that gradually tapers into deeper areas. Along the plateau, look for sandy chasms where white-tip reef sharks, stingrays, and nurse sharks often rest. Lionfish can be found within the crevices at the base of the mini-wall. The dive route allows for exploration of both the wall's topography and the extensive coral gardens of the plateau. A safety stop would typically be conducted in the shallower, calmer waters of the plateau before ascending for boat pick-up.

Underwater photography

Aliko Reef offers excellent opportunities for wide-angle photography to capture its expansive coral formations and encounters with larger marine life. A wide-angle lens (e.g., 16-35mm) is recommended for showcasing the massive Boulder Star Corals and the bright green Cabbage Patch Coral. External strobes are highly beneficial for enhancing color and detail in the corals and for illuminating sharks and rays in their sandy resting spots. For capturing smaller schooling fish or lionfish in crevices, a macro lens could also be valuable. Maintain neutral buoyancy to avoid contact with the delicate corals and sandy bottom, especially when photographing resting rays or sharks. Patience is key when waiting for marine life to reveal itself in the chasms.

Combine with nearby dive sites

• Mi'l Channel

  Adjacent channel known for manta rays and vibrant reef life.

• Cherry Blossom Wall

  Deep wall dive featuring black coral and deep-water sea fans below 36 meters, plus numerous hard and soft corals.

• Lionfish Wall

  Vertical wall at the southern tip of the fringing reef, known for lush coral and fish populations due to strong currents.

• Sunrise Reef

  Gradual slope with abundant hard corals and large coral pinnacles.

Getting there & logistics

Accessing Aliko Reef typically involves flying into Yap International Airport (YAP), with international flights often routing through Guam. From there, local dive operators provide boat transfers to the dive sites. Most dive trips are arranged as part of a multi-day itinerary with local resorts or liveaboards, offering multiple dives per day. Yap is known for its remote location and focuses on small group diving experiences. There are generally no specific permits or fees mentioned for individual dive sites beyond standard dive package costs.

Safety & environment

Micronesia does not have an active recompression chamber on Yap. In the event of a dive emergency requiring recompression, medical evacuation to a facility in Guam would be necessary. Divers are strongly advised to carry comprehensive dive insurance that includes medical evacuation coverage. At Aliko Reef, divers should be mindful of currents, although not explicitly detailed for this site, they are common in Yap's channels and outer reefs. Maintaining excellent buoyancy control is crucial to avoid damaging the delicate hard corals and disturbing resting marine life. Always dive within your training limits and follow your dive guide's instructions.

Who it suits — and who it doesn't

FAQ

Aliko Reef FAQ

Liveaboards diving Aliko Reef

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

Palau Siren

Micronesia

16 guests

$501/day

Solitude Gaia

Micronesia

18 guests40 m

$310/day

Palau Aggressor II

Micronesia

18 guests32 m

$354/day

Black Pearl

Micronesia

24 guests

$390/day

Ocean Hunter 3

Micronesia

16 guests29 m

$350/day

Pacific Master

Solomon Islands

20 guests30 m

$268/day