Seaworld Explorer Tours

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Your adventure begins in Grand Case, a quaint, unspoiled fishing village on the French side, famous for it's idyllic bay and delicious restaurants. Here our friendly crew will welcome you aboard the Seaworld Explorer a state of the art semi submarine developed for use on the Great Barrier Reef in Australia. Enjoy the scenic cruise through the harbor to the unique geological formations of Creole Rock.

Now it's time to discover the undiscovered St. Martin! The vessel does not submerge, you descend into the hull of the vessel and sit in air conditioned comfort five feet below the surface, observing underwater gardens, coral reefs and colorful fish through large, clear glass windows. As you marvel at this paradise beneath the waves, our diver swims by your window surrounded by schools of feeding fish (keep an eye peeled for the fascinating green and moray eels!)

Throughout the trip, our knowledgeable marine expert provides an informative and entertaining commentary.


Create lifetime memories aboard St. Martin's only semi-submersible, in the comfort of our cruising underwater observatory. Young and old alike will enjoy this wonderful opportunity to observe and learn about the remarkable varieties of tropical fish, even turtles, and coral in their natural habitat. 
Your knowledgeable marine guide will tell you all about the wonders you will be taking in throughout your tour. Learn about the delicate ecosystem of reef development and watch in awe as your experienced scuba diver hand feeds the fish - bringing them alongside your own large observation window.
Atlantis has carried hundreds of thousands of happy guests on our semi-submersible tours in St. Martin, and over 10 million guests on our various tours throughout the Caribbean, Hawaii and Guam. 
It's the perfect family activity!  Our tour in St. Martin includes a short, scenic coastal cruise that takes you to Creole Rock, where our scuba diver escorts you on the undersea exploration of a lifetime.  You'll see the stunning sea life and colorful tropical fish - so close you'll feel as if you can just reach out and touch them.



  • Coral reef
  • Tropical fishes
  • Roaming turtles

Above water:

  • Creole Rock
  • View of Anguilla
  • View of Grand Case Bay



Q: I am claustrophobic; can I go on the submarine tour?

A: Yes, and it may help you with this problem. Persons with claustrophobia, who have gone on the semi-submarine, report being surprised that you tend to focus out through the viewport into the wide open ocean space rather than inside of the submarine its self. Unlike on an aircraft where the windows are high and you cannot see anything interesting outside for most of the trip, in the semi-submarine, you sit with windows on both sides a view port in front. Most of all you are not stuck in the hull of the boat for the full tour if you really feel the need to disembark. It is best to notify your guide of your condition and you will be advised of the best sitting if you need to make a quick exit. In the event that you are very uncomfortable there are two exits one at either end so you need to be first or last when going into the hull of the boat. The semi-submarine is a large vessel that can accommodate up to 34 passengers comfortably. You can stand, sit and walk into and out of the semi-submarine very easily.

Q: I find the submarine tour to be expensive…

A: Atlantis is not a cheap tour, we agree but it offers excellent quality due to its uniqueness, high tech nature and professionalism. To be go underwater we must be in a highly sophisticated and safe vessel. Atlantis offers a number of discounted rates for children, teens; families, honeymooners etc, so we can work out a deal for you. Our customers say that they will definitely recommend the tour to others and that it was worth it.

Q: Is the Seaworld Explorer tour safe?

A: Our safety audits and stringent requirements for insurance purposes are a check and balance as we report conformance to all standards to our head office and insurers.

Q: Is there an age restriction?

A: No, this tour is for all ages.

Q: Do you provide a shuttle service?

A: Yes, you can be transported to your destination by our bus service that will pick you up at a pre-booked time.

Q: I am pregnant; will I be able to go on the Seaworld Explorer?

A: Congratulations, you should be fine, hardly any motion is felt whilst you are in the hull of the boat sitting in air conditioned comfort.

Q: Can a wheel chair guest or differently abled guest go on the Seaworld Explorer?

A: Yes but it depends on the mobility of the individual as guests need to descend 7 steps on their own into the vessel. Permission should be obtained from Operations department through the Reservations staff and it will also be dependent on the weather and sea conditions. Visually and hearing impaired guests are welcomed but for your safety and comfort the Reservations staff should be advised at the time of the Reservations.

Q: What will I see?

A: Our diver will entice schools of fish to your view point, it varies for each trip what will be spotted.



Boulevard de Grande Case, Grand-Case, Collectivité de Saint-Martin, Collectivity of Saint Martin

Start time: 0:00 - SeaWorld Explorer tour departs pier in Grand Case

Duration end time: 1:15 - SeaWorld Explorer returns to the pier

You can book a taxi transfer or pick up at the Cruise Terminal here:

For Pickup at your Hotel (please select option for hotel pickup).

Or you can select our Private Island Tour option for $400 US Dollar for your whole party up to a maximum of 14 passengers per airconditioned taxi van. If you want the Private Island Tour in a luxury SUV vehicle with our certified tour director, the maximum passenger capacity is 5-6 passengers. Unless otherwise indicated, when selecting the Private Island Tour option, we will book a 14-seater taxi van with taxi driver. See for more info about our private island tours, the itinerary and highlights.

Return back to Ship or Hotel by taxi (if picked up).

Your friendly smile and adventurous spirit.

On the return trip to shore, the crew will serve you a complimentary drink, which you can enjoy along with the magnificent view of Creole Rock and Grand Case Bay.

Not wheelchair accessible.

A contribution is made to the Marine Park Reserve when passengers check in for their scheduled tour.


All trip narrations are in English, however French and Spanish translations are available upon request.


We also provide transportation service. You can arrange for our tour bus to pick you up at your hotel. The additional cost is $11 per adult and $10 per child.

Ready to experience St. Martin's stunning undersea world on the SEAWORLD EXPLORER? Ready to board Atlantis Adventures' unique cruising undersea air conditioned observatory? Ready to marvel at the beautiful sea gardens, coral reefs and abundant varieties of sea life you would not believe St. Martin actually has?


Book now...

* This month is a very busy month with many cruise ships in port. However should you be interested in doing the Seaworld Explorer on the days that we don't have availability at a scheduled time, please contact us as we may be able to accommodate you on the cruise ship tours. *

20% non-refundable deposit required.

Boulevard de Grande Case, Grand-Case, Collectivité de Saint-Martin, Collectivity of Saint Martin