Marco Polo ventures into Thailand’s southern Andaman Sea, covering dive sites around Koh Haa and Hin Daeng. Great for both reef cruising and pelagic spotting

Operating in Thailand’s northern Andaman Sea, Manta Queen 3 brings divers to Similan and Surin sites like Koh Bon and Richelieu Rock, where whale sharks and harlequin shrimp can both show up

Explore Thailand’s Similan and Surin Islands aboard the Lapat liveaboard, including dives at Richelieu Rock. Small-group itineraries, Nitrox availability, eco-friendly amenities, and air-conditioned cabins ensure comfort throughout the trip

Similan Islands and Richelieu Rock headline Pawara’s itinerary, with manta rays, whale sharks, and colorful nudibranchs dotting the vibrant reefscapes

Bavaria liveaboard offers dive safaris to Thailand’s north and south Andaman hotspots. Highlights include Richelieu Rock, Koh Tachai, and encounters with whale sharks and ornate ghost pipefish

Diving the Similan Islands and Richelieu Rock, Thailand Master combines tradition with comfort, offering sightings of whale sharks, manta rays, and colorful reef systems

Seatopia liveaboard explores Thailand’s Similan and Surin Islands. Dive vibrant reefs, encounter whale sharks and leopard sharks, and enjoy small-group trips for a personalized experience.

Discover Thailand’s Similan and Surin Islands aboard the Camic liveaboard, with routes to Richelieu Rock. Small-group diving, Nitrox availability, eco-friendly amenities, and air-conditioned cabins support a comfortable journey

Explore Thailand’s top dive sites aboard the Raga liveaboard, cruising Similan and Surin Islands, including Richelieu Rock. Enjoy small-group diving, Nitrox, eco-friendly amenities, and air-conditioned cabins

Dive Thailand’s Andaman Sea with Gentle Giant liveaboard—6-night, 22-dive cruises to Similan Islands, Richelieu Rock, Hin Daeng & more. Small group comfort, top sites, limited departures

Sawasdee FaSai combines comfort with exploration, navigating the Similan and Surin Islands where encounters with mantas, whale sharks, and leopard sharks are frequent

With routes to Richelieu Rock and Koh Bon, Deep Andaman Queen delivers top-tier Andaman Sea diving in spacious, well-equipped comfort

With a max of 10 guests, Giamani offers a cozy way to explore Thailand’s Similan and Surin Islands. Expect reef sharks, leopard sharks, and macro life in well-paced dive itineraries

A restored Chinese sailing vessel, The Junk is full of charm and history. Dive Richelieu Rock and the Similan Islands while living aboard a piece of maritime heritage

Compact and friendly, Dolphin Queen explores Thailand’s Similan and Surin Islands, where leopard sharks, nudibranchs, and giant trevallies roam thriving reefs

Thailand Aggressor sails to Similan and Surin Islands, where whale sharks, leopard sharks, and sea fans fill the warm waters of the Andaman Sea

Experience the ultimate diving adventure on the DiveRACE Class X. Explore Thailand and Myanmar in luxury with en-suite cabins.

Smiling Seahorse specializes in diving Thailand’s North Andaman and into Myanmar’s Mergui Archipelago, where macro lovers and pelagic fans both find their match

With its relaxed, eco-conscious vibe, Merdeka 3 combines diving and wellness while exploring Thailand’s southern Similan sites. Sunset yoga and whale shark sightings both make the schedule

The Merdeka 1 yacht blends diving with comfort, stopping at Similan sites like Elephant Head Rock and Koh Bon, where leopard sharks and reef mantas cruise the clear waters