Keruo Channel

Keruo Channel is a drift dive in the Keruo Island area of Raja Ampat, West Papua, Indonesia. The channel funnels tidal currents between islands, creating an accelerated flow that concentrates nutrients, attracts pelagic fish, and provides the current-assisted glide that is one of the great pleasures of Raja Ampat diving.

Overview

As the tide pushes water through the channel, the current carries divers along a reef wall and over coral gardens at a pace determined by the tidal state. The channel walls are encrusted with dense soft coral, sponges, and sea fans that have colonised every available surface in the current-rich environment. Hard corals cap the shallower sections where the current briefly eases.

Pelagic activity peaks when current runs strongest: schools of rainbow runners, barracuda, and trevally position themselves in the flow to intercept prey. Grey reef sharks and whitetip reef sharks are commonly encountered along the channel walls, holding station in the current or resting in eddies behind large coral heads. Manta rays occasionally cruise through on strong current days, effortlessly riding the flow that the divers struggle to navigate.

Visibility runs 15–25 metres in clear conditions. Water temperatures average 27–30°C. The site is best dived on a running current for the full drift experience.

Marine Life

• Grey reef sharks and whitetip reef sharks along the walls
• Schools of rainbow runners, barracuda, and trevally
• Dense soft coral and sea fan growth on channel walls
• Occasional manta rays on strong current days
• Grouper and snapper in current eddies

Dive Profile

Divers enter upstream and drift through the channel at 10–25 metres, reading the terrain and moving between current and eddies to control pace. The liveaboard or day boat follows the bubble trail and picks up divers at the channel exit. This is a drift dive requiring reasonable buoyancy control. Entry and exit are by boat.

Practical Information

• Depth range: 5–25 m
• Visibility: 15–25 m
• Current: Moderate to strong (best on running current)
• Best time: October–April
• Water temperature: 27–30°C
• Entry: Boat (drift pickup)

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.