Dive with guitarfish and wedgefish among the remote reefs of the Mergui Archipelago and Similan Islands in the Andaman Sea. These critically endangered, shark-like rays are a rare sighting on liveaboard trips better known for their pristine reefs, whale sharks and mantas. Seas are calm and the Similan and Mergui marine parks are open from November to April, best from December to February.

Shark Ray in Mergui Archipelago / Similan Islands (Myanmar / Thailand)

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About This Spot

Dive with guitarfish and wedgefish among the remote reefs of the Mergui Archipelago and Similan Islands in the Andaman Sea. These critically endangered, shark-like rays are a rare sighting on liveaboard trips better known for their pristine reefs, whale sharks and mantas. Seas are calm and the Similan and Mergui marine parks are open from November to April, best from December to February.

Best Months to Visit

Up to 50% sighting chance in Mergui Archipelago / Similan Islands (Myanmar / Thailand). Best months: January, February, December.

  • January: 50%
  • February: 49%
  • December: 46%
  • March: 45%

Practical Information

  • Location: Mergui Archipelago / Similan Islands (Myanmar / Thailand)
  • Country: Myanmar (Burma)
  • Coordinates: 11.5000, 97.7000
  • Effort: expedition
  • Accessibility: Hard
  • Observation mode: Diving

Frequently Asked Questions

Can you reliably see guitarfish here?

No, they are a rare and lucky sighting; the Mergui and Similan reefs are better known for whale sharks, mantas and healthy corals.

When is the best time?

November to April, when the Andaman seas are calm and the Similan and Mergui marine areas are open to liveaboards.

How do you dive it?

By liveaboard, as these are remote reefs off Myanmar and Thailand with no land base nearby.

Why are guitarfish special?

Wedgefish and guitarfish are among the most endangered fish on Earth, so any encounter is a rare privilege.

Other Spots for Shark Ray

More wildlife to see nearby

Explore the Myanmar (Burma) wildlife travel guide