Experience a truly magical natural phenomenon on a nighttime kayaking tour in Lan Ha Bay to see bioluminescent plankton. On dark nights (ideally with little moonlight), paddling through specific areas allows you to witness the water light up with tiny, sparkling organisms that glow when disturbed by your kayak or paddle.

Several operators, often based on Cat Ba Island, offer guided bioluminescent plankton kayak tours, usually departing in the late afternoon to catch the sunset before paddling into the darkness. Gliding through the water as it shimmers with eerie, beautiful light is an unforgettable and surreal experience, showcasing the hidden wonders of Lan Ha Bay after dark.