Dive-site story
Situated along the northern coastline of Ulleungdo, Seonchang Dock serves as an accessible entry point featuring sheltered shallows that transition into volcanic boulder fields. Concrete harbor barriers and tetrapod structures provide habitat for juvenile reef fish before the seabed falls away into deeper bedrock terrain. Divers explore rocky gullies dense with seasonal brown algae while scanning crevices for octopuses and benthic macro life.
Volcanic rock terraces and boulder formations carpeted in seasonal kelp
Macro photography opportunities among dock pilings and tetrapod crevices
Frequent encounters with schooling damselfish and camouflaged bottom dwellers
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Late summer and early autumn bring the warmest water temperatures and optimal underwater visibility.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kurodai Black SeabreamAcanthopagrus schlegelii | Common | ||||||||||||
| East Asian Common OctopusOctopus sinensis | Common | ||||||||||||
| DamselfishChromis notata | Common | ||||||||||||
| Schlegel's Black RockfishSebastes schlegelii | Common | ||||||||||||
| Thread-sail FilefishStephanolepis cirrhifer | Seasonal |
Marine forecast
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