Oki Islands · Japan · Reef · Muck & macro
Iguri
Two fused rocks where yellowfin amberjack swarm around the group
Iguri is a rock-and-sand site off Nishinoshima, built around two rocks stuck together on a flat bottom of sand and seaweed patches. It looks plain at first, a scene typical of the Sea of Japan, but divers after macro life find nudibranchs and small crabs in the weed while schools of fish work the rocks.
Where it is and how deep
No published position for this site — the map shows Oki Islands and its other sites; operators know the mooring.
The dive
Divers descend to about 16 m at the anchor, which sits in the gap between the two rocks, so the site is simple to navigate. Around the rocks the bottom flattens out at about 20 m into sand with scattered patches of seaweed.
Searching the leafy green seaweed turns up many colourful nudibranchs, orange starfish and shy little crabs that scuttle off as a diver approaches. Schools of chicken grunts patrol the rocks, yellowfin amberjack swarm around the group and damselfish gather in clouds.
Marine life and season
- Nudibranchs
- Macro critters
- Trevally & jacks
- Reef fish swarms
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair | Fair | Good | Good | Good | Prime | Prime | Prime | Fair | Fair | Good | Fair |
Season follows Oki Islands: Summer brings calm straits and the clearest water; typhoons peak in September and October, and winter waves cancel ferries.
Questions divers ask
What certification does Iguri need?+
Advanced Open Water suits the dive: the descent reaches about 16 m and the sandy bottom around the rocks lies at about 20 m.
Sources
- Dive into the Other Oki Islands — Outdoor Japan
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