Seamount

Seamount is an offshore pinnacle and wall dive in the Keruo area of Raja Ampat, West Papua, Indonesia. Rising from deeper open water, the structure creates a focal point for marine life in an otherwise featureless seafloor, drawing both resident reef species and open-water pelagics to its flanks.

Overview

The seamount’s upper plateau lies at a diveable depth, making it accessible for exploration while still commanding the deep water on all sides. The summit and upper walls are encrusted with prolific hard coral growth — table corals, Acropora thickets, and massive Porites heads — that have capitalised on the structure’s exposed, current-bathed position. Nutrient-rich water washing over the summit supports dense schools of fusiliers and anthias that perpetually cloud the upper section.

The flanks of the seamount drop away more steeply and transition to sea fans, soft corals, and encrusting sponges. Current running past the structure brings pelagics: rainbow runners, dogtooth tuna, and barracuda patrol the open water within metres of the wall face. Grey reef sharks are regularly seen circling the deeper flanks, and eagle rays cruise past with their characteristic wingtip-first descents.

Visibility reaches 20–30 metres in good conditions. Water temperature averages 27–30°C. Currents are variable — the seamount sits in open water and can experience stronger flow than nearby inshore sites.

Marine Life

• Dense Acropora and table coral on the summit
• Grey reef sharks circling the deeper flanks
• Eagle rays and dogtooth tuna in the blue water
• Barracuda and rainbow runners along the wall
• Schools of fusiliers and anthias on the summit plateau

Dive Profile

Divers descend the wall from the summit at 8–10 metres down to 20–25 metres, exploring sea fans and overhangs before circling back to the shallower summit for the safety stop. The seamount’s isolation in open water means navigation is straightforward — the structure fills the view in every direction. Entry and exit are by boat.

Practical Information

• Depth range: 5–25 m
• Visibility: 20–30 m
• Current: Moderate (variable with tide)
• Best time: October–April
• Water temperature: 27–30°C
• Entry: Boat

Sources: Papua Diving - Raja Ampat Dive Sites, Bluewater Dive Travel - Raja Ampat Diving, La Galigo Liveaboard - Top 10 Raja Ampat Dive Sites, Girls That Scuba - Scuba Diving Raja Ampat, PADI - Diving in Raja Ampat. Last updated 2026-04-04.