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Bioluminescent Plankton
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Bioluminescent Plankton

Koh Rong Island, Cambodia
Koh Rong is famous for its glowing bioluminescent plankton — a magical natural phenomenon that lights up the sea with sparkling blue light at night.

The bioluminescent plankton can be seen best in areas with little light pollution. When you move your hands through the water, the sea sparkles with millions of glowing dots, creating an unforgettable experience.

Where to see bioluminescent plankton

  • Police Beach
  • Long Set Beach
  • Special night boat tours departing from Koh Toch

Best time to see it

The phenomenon is visible year-round, but the best viewing conditions are on moonless nights.

Tips for visiting

  • Avoid using lights — darkness makes the plankton glow brighter.
  • Join an organized boat tour for the safest experience.
  • Wear swimwear if you want to enter the glowing water.

Experiencing bioluminescent plankton is one of the most magical and memorable activities in Koh Rong.