Setouchi Whale Shark Channel
Amami Islands · Japan
During summer months, whale sharks cruise the plankton-rich straits around Setouchi, making this one of the most accessible whale shark encounters in Japan. The channel concentrates nutrient upwellings that fuel dense zooplankton blooms, drawing filter feeders and the full pelagic food web they sustain. Surface conditions are typically calm in July and August, allowing snorkellers and divers alike to drift alongside these gentle giants in crystal clear water.
Conditions
Depth
5 to 30 m
Open water and up
Current
Usually gentle
Can pick up on the edge
Visibility
15 to 25 m
Clearest in the calm season
Water
18 to 31°C
3mm wetsuit
Your chances of seeing each animal
Giant TrevallyLeast concern
Sometimes
About 1 in 3 dives
Spotted Eagle RayEndangered
Sometimes
About 1 in 3 dives
Whale SharkEndangered
Rare
Now and then
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