Catalina Island Undersea Expedition - Santa Catalina Island

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Tour Information

Key Details

  • Printed Voucher Required
  • Instant Confirmation
  • Lowest Price Guaranteed
  • Duration: 45 Mins
  • Language:
  • Departure Time :
    Times May Vary., Summer Schedule (Memorial Day thru Labor Day) 10am, 11am, 12pm, 1pm, 2pm, 3pm, 4pm & 5pm , Off season Schedule: 12pm, 1pm, 2pm & 3pm.,
  • Departure Details :
    1 Green Pleasure Pier, Avalon, CA 90704, USA
  • Return Details :
    Returns to original departure point
  • Cancellation Policy :
    This activity is non-refundable Tours booked using discount coupon codes will be non refundable.


Come face-to-face with Catalina's abundant marine life on this 45-minute underwater excursion. Cruise five feet below the surface in a spacious, climate-controlled cabin with a live guide suggesting salient points of interest. Every passenger has their own seat and port hole but you are also free to roam around the cabin for other viewpoints.


  • See the underwater world without getting wet
  • Close encounter with wildlife
  • Ideal choice for families
  • Popular choice with kids
  • Multiple times offered throughout the day
  • Informative, friendly and professional guide

Know More about this tour

The 45-minute tour begins in Avalon Harbor where you will board the semi-submersible and venture below the waterline for a grand view of the marine world. The marine reserve displays a variety of colorful sea life to see. The deckhand aboard the vessel will share interesting facts about the creatures you observe and will feed the fish from the vessel as you are passing through the cove to ensure an up-close encounter with a variety of specifies.

As you return to the harbor, you'll be invited on deck to take in the sights of Avalon.


Live commentary on board



Additional Info

Confirmation will be received at time of booking

Not wheelchair accessible

Restrooms are not available while on tour, but are available at the base of the Green Pleasure Pier, so please use before check-in

Please check your email through Viator for your confirmation number and tour information

Near public transportation

Infants must sit on laps

Most travelers can participate

This experience requires good weather. If its canceled due to poor weather, youll be offered a different date or a full refund

This tour/activity will have a maximum of 12 travelers

Face masks required for travelers in public areas

Face masks required for guides in public areas

Face masks provided for travelers

Hand sanitizer available to travelers and staff

Social distancing enforced throughout experience

Regularly sanitized high-traffic areas

Gear/equipment sanitized between use

Transportation vehicles regularly sanitized

Guides required to regularly wash hands

Regular temperature checks for staff

Paid stay-at-home policy for staff with symptoms

Contactless payments for gratuities and add-ons

Face Masks are to be worn through out the voyage!

Traveler Reviews

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  • 11-Nov-2022

    I really enjoyed the expedition. The tour staff were all friendly and informative. It was great seeing all the marine life.

  • 25-Jul-2022

    The boat over there had an emergency and we turned around and went back to Newport and then back to Catalina. Took 3 hours and our day was wasted away.

  • 17-Jul-2022

    The tour was so fun. On the guide was funny. So glad I went, I will for sure be doing this again. Loved it

  • 12-Jul-2022

    Did you know that there are TWO companies offering submarine tours in Catalina? Neither did I. The one I booked, Catalina Island Company Undersea Sub Expedition (the red boat), was the more expensive tour. This is ironic because the boat didn’t seem so well maintained. Seaweed was growing around the edges of the windows, and the glass had goop marks and haze from stuff growing on it. We were booked for a 1:00 p.m. cruise, and they requested us to be at the dock in line by 12:40p. Then the crew made us stand in line, on the dock in the sun with no shade, while they finished lunch. We watched one of them eat a sandwich. We waited twenty minutes, outside at midday, something that I would never do normally. So I was subsequently surprise-sunburned pretty bad. After we boarded, I was disappointed to find that the submarine windows were caked and framed in seaweed, growing outside of the sub window seals, and waving with the water into the window. My window also had a large glop of algae in the middle. The semi-submersible tour was pleasant enough. The captain of the sub is a local who grew up on Catalina. He and the crew kindly offered a narrative of the fish and the reef as we motored about the bay. The experience of seeing fish in a natural setting is really quite lovely, once I was able to ignore the seaweed swirling and flopping about NOT on the ocean floor but around the edges of my window. Everyone was friendly. But next time I’ll book the other company (the yellow boat) and hope for a better overall experience.

  • 07-Jul-2022

    It was fun, but spendy if you have a large famy. We saw a bunch of fish. The only real interesting ones were the orange ones, but still fun and worth doing, especially if you have younger children who would appreciate seeing fish. It was great to say we spent time in a 'submarine'. The guide was knowledgeable and fun!

  • 26-Jun-2022

    I had fun watching all the fish. The crew were friendly and knowledgeable. I would go again. The only issue I have is with this review. You have to add at least 100 characters before you can submit the review.

  • 30-May-2022

    Traveling underwater with the school of fish and being able to identify the fish was a treat of an experience!

  • 23-May-2022

    This was a great adventure. They fed the fish right beside the boat so you are guaranteed to see lots of fish. It was a great time.

  • 30-Apr-2022

    Amazing views of our native fish in their natural habitats. Seeing the giant kelp beds was amazing too. I was really surprised by how good the visibility was. 10/10 would definitely recommend. If you are going to visit Catalina Island don’t miss this!

  • 02-Mar-2022

    Company was very accomodating to change our reservations. Great underwater view of protected area. Great way to see underwater ecosystem and view several schools of fish. The tour guide could have explained more about the fish and other species we didn't see but could have seen.

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