Stricter guidelines aim to protect coral reefs and marine life
If you’re planning a diving or snorkelling trip to Thailand, there’s an important update you should be aware of. As of April 22, 2025, new national regulations are in effect to protect Thailand’s coral reefs and marine ecosystems. These rules, issued by the Ministry of Natural Resources and Environment, will remain in place for the next five years under the Marine and Coastal Resources Management Act.
Whether you’re a first-time snorkeller or a certified dive pro, these changes impact everyone who enters Thailand’s beautiful marine zones. Here’s a clear and friendly breakdown of what you need to know.
Why the New Rules?
Thailand’s coral reefs are breathtaking, but they’re also extremely fragile. Years of tourism, pollution, and careless marine activities have taken a toll. The new rules aim to reduce damage and promote sustainable marine tourism by making sure visitors and tour operators follow best practices for reef protection.
What Dive and Snorkel Operators Are Now Required to Do
All dive trips must now be supervised by a certified dive supervisor or assistant. For snorkelling near coral reefs, tourists must wear life vests at all times, unless they hold a recognised freediving certificate (which must be shown upon request).
Before any diving or snorkelling activity begins, participants must receive a briefing on the laws and proper conduct. If you’re entering protected areas—like national parks or designated marine zones—supervisors must also explain any site-specific rules.
New Safety Rules and Group Size Limits
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Deep dives: One supervisor for every four divers
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Snorkelling/freediving: One supervisor for every 20 people
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Introductory dives: One supervisor per two learners
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Certified dive training: One instructor per four students
Supervisors must also ensure all participants understand how to properly control their fins to avoid damaging coral. Only those with demonstrated skill may approach coral reef zones.
Underwater Photography: Not for Everyone
Love taking photos underwater? New restrictions apply. You can only carry a camera during training or recreational dives if:
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You’ve completed an Advanced Open Water certification (PADI, SSI, etc.), or
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You’ve logged at least 40 dives, or
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You’ve completed an accredited underwater photography course
Proof of certification must be presented to authorities upon request. If you don’t meet these qualifications, leave the camera behind.
What’s Now Banned in Coral Reef Areas
The following activities are now strictly prohibited in and around coral reefs:
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Touching, collecting, or displaying coral or marine animals
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Feeding fish or stirring up sediment (which can smother coral)
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Littering or causing disturbance to marine life
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Underwater walking tours like Sea Walker or seabed-based activities
These behaviors pose serious threats to coral ecosystems and are now enforceable offenses.
What Happens If You Break the Rules?
If a tourist refuses to wear a life vest, touches coral, or fails to follow supervisor instructions, the activity must be stopped immediately. Supervisors are legally required to report violations to national park or marine authorities.
Dive operators, supervisors, or assistants who fail to comply could face loss of certification or operating licenses.
Note: These rules do not apply to academic, research, or conservation dives that are officially supervised.
Protect the Ocean, Enjoy the Experience
Thailand’s marine environments are some of the most beautiful in the world—and they deserve protection. These new regulations highlight the country’s commitment to conservation, without taking away from the wonder of diving and snorkelling here.
Before booking your next trip, make sure you’re going with a certified operator who follows these new national standards. Ask questions, stay informed, and most of all—enjoy Thailand’s reefs responsibly.