Siaes Corner

A current-swept wall on Palau’s western barrier reef that delivers Blue Corner-caliber shark action with a fraction of the diver traffic

Overview

Siaes Corner is a wall dive on the western side of Palau’s barrier reef, northwest of Ulong Island, typically combined with Siaes Tunnel on a single trip. The site features a pronounced reef corner where ocean currents converge, attracting grey reef sharks, eagle rays, and other pelagics. The wall drops steeply from a coral-topped reef at 5–8 meters to well beyond recreational limits. What makes Siaes Corner notable among experienced Palau divers is its relatively lower boat traffic compared to Blue Corner — encounters with sharks and rays feel more intimate with fewer divers present. The coral along the wall is in good condition, with sea fans, soft corals, and hard coral formations.

Site Information

• Location: Northwestern barrier reef, west of Ulong Island, Palau, Micronesia
• Entry Type: Boat dive
• Site Type: Wall dive
• Difficulty Level: Advanced
• Maximum Depth: 21 meters
• Typical Visibility: 20–40 meters (65–130 feet)
• Current: Moderate to strong at the corner
• Best Time: Year-round; best pelagic action with incoming current

Marine Life

Grey reef sharks patrol the corner in groups and are the primary attraction, often approached more closely than at the busier Blue Corner. Spotted eagle rays pass by regularly. Whitetip reef sharks rest in crevices along the wall. Schools of barracuda and bigeye jacks form in the blue water off the wall edge. Napoleon wrasse cruise the reef top. The wall carries sea fans, soft corals, and barrel sponges. Fusiliers and surgeonfish school along the wall face. Nudibranchs and small crustaceans inhabit the crevices.

Dive Profile

Descend to the reef top at 5–8 meters and make your way to the corner where the current is strongest. A reef hook may be needed to hover and watch the pelagic show. Then drift along the wall, staying between 10–21 meters where the coral and fish life is most concentrated. Watch your depth — the wall drops beyond recreational limits. Ascend to the reef top for a safety stop in the coral garden. Total dive time typically 45–55 minutes depending on current and air consumption.

Entry and Exit

Boat dive from Koror (approximately 50 minutes) or from liveaboards. Entry by giant stride with descent to the reef top. The dive is usually a drift with SMB pickup. Current direction determines the drop and drift direction. Deploy your SMB at 5 meters.

Tips and Recommendations

• Bring a reef hook — the current on the corner can be as strong as Blue Corner
• The corner itself is where the action is — spend time here rather than rushing to drift the wall
• Watch the blue water off the wall edge for passing eagle rays and shark patrols
• Pair with Siaes Tunnel on the same day for a tunnel-and-corner experience
• Lower traffic than Blue Corner often means calmer, less-disturbed marine life encounters

Safety Considerations

Strong and unpredictable currents are the main hazard. Down-currents along the wall can occur. Stay close to your guide and group. Carry signaling devices and an SMB. Reef hook use should be on dead coral or rock only. Advanced certification and current-diving experience are required.

Photography

Wide-angle is essential for capturing sharks on the corner and the wall’s sea fan gardens. Lower diver traffic means marine life is often less skittish, allowing closer approaches. Shoot the sharks against the blue water background for clean compositions.

Sources: Palau Dive Adventures, Fish N Fins Palau – Siaes Corner, Dive The World – Palau. Last updated 2026-06-25.