• Location: St. Thomas, US Virgin Islands
  • Duration: 60 minutes (approx.)
From USD $ 32.00 View price calendar

Low Price Guarantee

Discover the Caribbean's underwater world on this 1-hour semi-submarine excursion from St Thomas. View schools of tropical fish, vividly-colored coral, sea turtles and stingrays from the dry comfort of a semi-submerged vessel. Watch a fish-feeding demonstration with engaging commentary from your naturalist guide and keep an eye on the ship's screens, which show a 'live dive cam' perspective. Return to Coral World Ocean Park to experience the rest of the venue's attractions at your own pace.


  • 1-hour semi-submarine cruise off the coast of St Thomas, a Coral World Ocean Park experience
  • Explore the azure-blue Caribbean Sea with an expert marine naturalist
  • Enjoy panoramic views of the seascape from the 40-window underwater viewing room
  • Discover tropical reefs and ship wrecks teeming with tropical fish, sea turtles and stingrays
  • Spend the rest of your day at Coral World Ocean Park with your provided admission ticket

What You Can Expect

Semi-Submarine Cruise at Coral World Ocean Park in St Thomas

Observe marine life up close from the underwater viewing cabin

Make your way to the east end of St Thomas and board your semi-submarine at the dock near Coki Beach. This partially submersible vessel allows you to view the vibrant underwater world from the dry, air-conditioned comfort of a boat. Find a spot on the upper deck for a view from above the water, or head down below to the ship's 40-window underwater viewing room. 

Learn about this underwater habitat teeming with marine life from your naturalist guide, as well as some history about the US Virgin Islands. Pass shipwrecks and keep an eye out for stingrays and turtles. Watch schools of tropical fish congregate around the boat as the staff conducts a live fish-feeding demonstration. 

Guests of all heights and ages are welcome on this tour, making it a family-friendly option for exploring St Thomas' marine environment. Watch as a professional diver operates an underwater camera, streaming the live feed to the boat's monitors. Enjoy the up-close diver's view of the spectacular seascape without needing your own SCUBA certification. 

The boat will return to the dock after an hour of exploring the ocean. With your admission ticket, discover Coral World Ocean Park's attractions at your own pace.

Customer Reviews


5 star rating: Highly Recommended April 2016

My kids enjoyed the submarine cruise, and it was very informative.


5 star rating: Highly Recommended April 2016

kids loved it.

Theresa M

5 star rating: Highly Recommended January 2016

Loved it. Wonderful tour and guides were very informative.

Cathy T

5 star rating: Highly Recommended May 2015

Great fun and wonderful tour guide

mark e

4 star rating: Recommended May 2016

Water was a bit murky due to rain, but the trip itself was very enjoyable.

Tara R

3 star rating: Worth doing February 2016

Coral World, like most things on the island, is hard to find without proper street signs. The park is small, especially if you don't know to bring your bathing suit so you can buy the water experiences. The sub ride was good, but it's short and pretty crowded. Glad we did it, but we peobably won't do the sub again.

Lorie S

2 star rating: It was OK, but could have been better April 2018

We arrived at Coral World , only to be told that Cruises had been discontinued until Coast Guard had inspected the boat. They wanted to know how I had ordered this event, when they had put it on hold on computer. I understand the hurricane last year caused much headaches, but when you are planning for your family to do an event, it was a little disappointing.

Carol F USA

1 star rating: I do not recommend this November 2016

This was an extremely disappointing tour. Coral World is in a remote area of St. Thomas, accessed by taxi from the cruise pier and takes about an hour to get there, especially if Coral World is not the only destination. When we arrived we were told to go to a location to board the semi sub at 2:15. There were 2 other couples waiting. It was very hot and they did not have fans on. After a very long wait--far longer than the 2:15, the tour guide showed up, bringing a larger group of people. He took us on a very treacherous path of loose stones, up and down stairs to the dock, telling us how wonderful their new construction was going to make Coral World The boat itself was old and run down as is most of Coral World and the view of undersea very cloudy. Had not a diver appeared to disperse food, no fish would have been seen. We saw a few tropical fish, some small sharks and the sea bottom corals. Nothing beautiful as the video on the boat shows in vivid color!

For the price it was not at all worth it and I think Viator should rethink dealing with this location. I have seen way more beautiful aquariums and tropical fish elsewhere and for less money. They advertise and glory in their opportunities for human interaction with wildlife which is scientifically known to be damaging to the wildlife.
My photos did not come out due to the murky water.

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