Board a traditional longtail at sunset from Ao Nang, cruise past limestone cliffs to Railay, then slip into darkened water to see bioluminescent plankton light up with each stroke. This three-hour evening trip blends a dramatic Andaman sunset with a rare night swim experience.
More ways to explore the area's outdoor wonders
The sky slows into a bruised orange as a longtail slips away from Ao Nang's shore, cliffs stoic and dimming at the water’s edge. The boat's engine hums; the sea ahead seems to take a breath and then, as darkness deepens, the water begins to glow—tiny lights trailing your hand like stardust dragged across a black cloth.
Difficulty
easy
Duration
3 hours
Fitness Level
Suitable for most fitness levels; basic swimming ability recommended for night swims
Wildlife
History
Krabi’s coastline is defined by steep limestone karsts formed over millions of years; coastal communities, including the Moken, have long hunted and navigated these waters.
Conservation
Tours limit light and boat numbers to minimize disturbance; avoid sunscreen and plastics, follow guides’ instructions, and don’t touch coral or reefs to protect fragile marine ecosystems.
Reserve your spot on the Krabi Ao, nang Bioluminescent plankton by longtail boat today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Minimize light
Turn off phone flashes and use red-light modes—bright lights wash out the bioluminescence and disturb wildlife.
Use reef-safe sunscreen
Apply reef-safe sunscreen before boarding and rinse minimally—chemicals harm plankton and reefs.
Bring a waterproof pouch
A sealed pouch protects your phone for low-light photos and keeps valuables dry on a longtail.
Wear water shoes
Stepping onto rocky beaches or boarding a wet boat is easier and safer with water shoes.
Life jacket (provided or personal)
Keeps you buoyant during night swims and is required on many operators.
Waterproof phone case or dry bag
Protects electronics and allows limited low-light photos without exposing devices to water.
Red-headlamp or flashlight with red filter
Preserves night vision and minimizes disturbance to bioluminescent organisms.
summer
Reef-safe sunscreen
Reduces chemical impact on marine life while protecting your skin in tropical sun.
summer