Walk on the ocean floor and hand-feed exotic fish in the crystal-clear waters of Koh Larn—no SCUBA experience necessary.
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All the details about your upcoming adventure in one place
The Undersea Walk at Coral Island (Koh Larn) is one of Pattaya's most accessible and thrilling marine adventures. Unlike scuba diving, which requires extensive training, sea walking utilizes a unique pressurized helmet that allows you to breathe normally while walking on the seabed at depths of 4 to 5 meters. You'll be surrounded by vibrant coral gardens and inquisitive tropical fish, often getting the chance to feed them by hand. Most tours depart from Pattaya's Bali Hai Pier via speedboat, whisking you away to the white sands of Koh Larn in just 20 minutes. It is a perfect activity for non-swimmers, families, and those looking for a unique perspective of Thailand's Gulf. Through our platform, you can compare various packages that bundle this experience with parasailing, jet skiing, and traditional Thai or Indian lunches.
We only list tours from reputable operators like Viator who meet strict safety and service standards in the Gulf of Thailand
Access competitive rates and exclusive bundles that combine the undersea walk with other popular water sports
Read authentic reviews and view photos from thousands of travelers who have already explored Coral Island
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November to April (Dry Season) for best visibility|May to October (Green Season) for fewer crowds and lower prices
Swimwear|Light t-shirt or rash guard|Flip-flops or water shoes|Change of dry clothes for the return trip
Koh Larn was once a quiet fishing outpost but transformed into a major tourism hub in the 1970s as Pattaya grew into an international destination.
Most tours offer a full refund if cancelled at least 24 hours before the experience start time. Check specific tour terms for details.
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Real experiences from real travelers
Booking through this platform was seamless. The undersea walk at Koh Larn was the highlight of our Pattaya trip. Being a non-swimmer, I was nervous, but the guides were so patient. Seeing the fish up close was magical!
We booked the package with the Indian lunch and sea walking. The boat ride was a bit bumpy but the island is beautiful. The undersea walk felt very safe and the photos they took were great quality.
Very well organized. Picked up from our hotel on time. The sea walk is a must-do. You just walk on the sand and the fish come right to your helmet. High quality equipment used by the operator.
I loved the variety of fish at Coral Island. The booking process was easy and I liked that I could see the reviews before paying. Make sure to bring extra sunscreen as the sun is intense!
My 10-year-old son loved the sea walker. It's much easier than snorkeling for kids. The platform was well-maintained and the water was very clear. Highly recommend booking the early slot to avoid crowds.
Koh Larn is stunning. The undersea walk was a unique way to see the reef. Our guide was very professional. The seafood lunch included in our booking was fresh and delicious.
Everything from the speedboat to the undersea walk was professional. Using this site made it easy to compare the different operators. The sea walker activity is very stable and peaceful.
A bit crowded on the weekend, but the activity itself was great. You get a lot of fish around you. The helmet is heavy on land but weightless in water. A great experience!
Everything you need to know for your journey
No, swimming skills are not required. You will be walking on the sea floor with your head inside a pressurized helmet that keeps your face completely dry and allows you to breathe naturally.
The activity typically takes place at a depth of 4 to 5 meters (approximately 13 to 16 feet), where the coral reefs are most vibrant and sunlight penetrates easily.
Yes, you can wear glasses or contact lenses. The air pressure inside the helmet keeps the water out, so your face and eyes remain dry throughout the experience.
The time spent on the ocean floor is usually between 15 to 20 minutes, which is plenty of time to explore the reef and feed the fish.
The best time is during the dry season, from November to April, when the water visibility is at its peak and the sea is calmest.
Most operators require participants to be at least 7 years old and in good physical health. There is generally no upper age limit as long as the person is mobile and has no respiratory issues.
No, your head and hair will stay completely dry inside the helmet. However, the rest of your body will be submerged in water, so you should wear swimwear.
This depends on the specific tour you book. Some premium packages include professional photography and drone footage, while others offer it as an optional add-on for a fee.
Just like on an airplane, you can equalize the pressure in your ears by swallowing or yawning. The guides will demonstrate how to reach inside the helmet to pinch your nose if needed.
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