Watch Bioluminescent Plankton in Koh Phi Phi: The Ultimate Guide
- Discover Phi Phi
- Jul 18, 2024
- 3 min read
Updated: Jul 20
Witnessing bioluminescent plankton is one of the most magical natural phenomena you can experience in Thailand. If you have ever wanted to swim through water that lights up like a starry night sky, Koh Phi Phi is one of the absolute best places in the world to do it.
However, there is a lot of misinformation online about what this experience actually looks like and how to see it. We want to make sure you have the exact facts, logistics, and booking details so you can experience this breathtaking highlight perfectly.
What is Bioluminescent Plankton?
Bioluminescence is a captivating natural phenomenon that occurs when microscopic marine organisms emit light in the dark. This mesmerizing display is caused by a natural chemical reaction within the plankton's cells.
When the water is disturbed, the plankton light up underwater as a defensive mechanism. The sudden burst of glowing light is designed to startle predators, allowing the plankton to escape. For human observers, it creates an unforgettable, glowing aquatic wonderland.
Expectation vs. Reality: Does it look like the photos online?
If you search for photos of glowing plankton online, you will find images of entire beaches glowing bright neon blue. We want to be completely honest: these pictures are heavily edited and long-exposure photographs.
The reality is different, but equally magical:
You must be in the water: Unless you are actually underwater wearing a snorkel mask, you will not see the brilliant neon blue glow from a dry boat deck.
Movement triggers the magic: The plankton only lights up when agitated. To see the phenomenon, you need to gently move your arms and legs underwater. When you stir the water, the plankton will instantly sparkle around you like thousands of underwater diamonds.
Can I see Bioluminescent Plankton in Koh Phi Phi?
Yes, absolutely! Monkey Bay at Koh Phi Phi is a world-famous spot for observing bioluminescent plankton, and it can be witnessed every single day of the year.
However, there are two crucial logistical rules you must know before planning your trip:
1. It Requires Complete Darkness
Because this phenomenon requires total darkness to be visible, it cannot be seen on a standard day tour to Koh Phi Phi. There are no public boat transfers leaving the island after dark. To experience the glowing plankton, you must stay overnight on the Phi Phi Islands.
2. You Must Book the Right Tour
You cannot safely swim out to these dark bays alone at night. We have designed our itineraries to perfectly include this bucket-list experience. You can see the plankton on the following excursions:
Group Speedboat Tours: The glowing plankton swim is fully included as the final, magical stop on our evening itineraries. You can either book the Sunset Deluxe Tour, or the Discovery Plankton Tour: Link on the buttons below.
Classic Private Longtail Tours: If you prefer a personalized experience, simply choose the afternoon departure of our 4-hour, 6-hour, or 7-hour Classic Private Longtail itineraries to ensure you are at the bay right as darkness falls. Link on the buttons below.
The Verdict: Don't Miss It!
Swimming with bioluminescent plankton is a true highlight of the Andaman Sea and will leave you with an unforgettable holiday memory. Make sure you don't miss out on this experience when visiting the islands!
