Seopjikoji Reef
Dive site
The windswept basalt cape on Jeju's east coast extends underwater as a dramatic stepped reef system. Where the warm Tsushima Current meets cold Yellow Sea upwellings, species from both water masses overlap — subtropical reef fish sharing the reef with cold-water kelp beds and boreal invertebrates. An ecological meeting point unlike almost anywhere else in Asia.
Conditions
Depth
5 to 25 m
Open water and up
Current
Usually gentle
Can pick up on the edge
Visibility
12 to 22 m
Clearest in the calm season
Water
10 to 26°C
5mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 11 | 10 | 11 | 13 | 16 | 19 | 22 | 23 | 22 | 18 | 14 | 11 |
| Vis (m) | 6 | 6 | 8 | 10 | 12 | 12 | 10 | 8 | 12 | 12 | 10 | 8 |
| Current | Moderate | Moderate | Moderate | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
Your chances of seeing each animal
Korean rockfish
Sometimes
About 1 in 3 dives
Sea urchin
Sometimes
About 1 in 3 dives
Giant Pacific octopus
Photo: KJ · CC BY-NC
Sometimes
About 1 in 3 dives
Yellowtail amberjack
Photo: Marine Explorer (Dr John Turnbull) · CC BY-NC-SA
Rare
Now and then
Field journal
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Gear