Glide through mangrove shadows as thousands of fireflies ignite the Iwahig River. This gentle evening cruise from Puerto Princesa pairs local interpretation with low-impact viewing for an unforgettable natural light show.
More ways to explore the area's outdoor wonders
The river narrows as dusk arrives and the boat’s motor softens into a hush; mangrove roots lean over the glassy water like curious hands, and the guide dims the small lantern. Minutes later the riverbanks begin to glitter—countless fireflies pulsing above the mangroves, tiny ambassadors of a living reef of light that moves in response to the tide and the dark.
Difficulty
easy
Duration
2–4 hours
Fitness Level
Minimal fitness required; able to step on/off a low boat and sit quietly for up to 90 minutes.
Wildlife
History
Iwahig’s river corridors have long supported small-scale fishing and were later recognized for their firefly concentrations, leading to community-led protection efforts and the establishment of the Eco Park.
Conservation
Tours emphasize minimal lighting and quiet boats to protect firefly mating displays; avoid single-use plastics and follow guide instructions to reduce disturbance.
Reserve your spot on the Iwahig River Cruise and Firefly Watching Tour in Puerto Princesa today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring insect repellent
Apply DEET- or picaridin-based repellent before boarding—mosquitoes are active near mangroves at dusk.
Use a red-filtered light
A red headlamp preserves your night vision and disturbs fireflies less than white beams.
Wear stable footwear
Docks can be slippery; closed-toe shoes with grip make getting on and off the boat easier.
Avoid bright clothing or flash photography
Bright lights and flashes reduce viewing quality for others and can disorient insects and wildlife.
Insect repellent (DEET or picaridin)
Keeps mosquitoes at bay during dusk on mangrove-lined banks.
summer
Lightweight rain jacket
Tropical showers can pop up—waterproof layer keeps you dry during transfers and dock waiting.
wet-season|null
Headlamp with red filter
Hands-free light for boarding while preserving night vision and limiting disruption to fireflies.
Waterproof phone/camera case
Protects gear from splashes and humidity while you photograph low-light scenes.