Undersea Expedition

Duration: 45 minutes

Location: Tour meets on the left side of the Green Pleasure Pier



Senior (55+)


Child (2-11)


Ticket prices include City of Avalon harbor use fee


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Explore the ocean deep on this exciting journey under the sea!

  • Explore the undersea gardens around Catalina Island while staying completely dry.
  • See a variety of plant and animal life including sea lions, calico bass, Garibaldi & more.
  • Watch a feeding frenzy commence as schools of fish surround your porthole.
  • Enjoy a leisurely harbor cruise as you head back into Avalon Harbor.
  • This is more than a tour; it’s an undersea adventure.

This tour on Catalina Island is available for most guests. Please see restrictions below.

Watch the feeding frenzy as schools of fish go crazy for food from above. Get ready for fun!

Guests must transfer; have the ability to use stairs and ramps to enter & exit.

Guests of all ages are welcome aboard; infants required to have a ticket per Coast Guard regulations

What to Expect

Come face-to-face with Catalina’s abundant marine life by cruising five feet under water in a spacious, climate-controlled cabin. Every passenger has their own seat and port hole plus you’re free to roam about the cabin seeking other viewpoints.

What you should know about this experience and COVID-19:

  • Masks are mandatory for all guests
  • Capacity is limited to allow for social distancing
  • Additional sanitizing is happening regularly

What marine life will we see?  Experience underwater sights from aboard the Sea Wolf Semi-Submersible on Catalina Island. You’ll see an incredible array of undersea dwellers: bright orange garibaldi, spotted calico bass, urchins, rock fish and bat rays, just to name a few.

What to bring and wear:  Wear comfortable clothes and shoes based on the season. High heels are not recommended. Check the Catalina Island weather forecast and dress appropriately. Small bags/purses can be accommodated, but please do not bring any large bags aboard. Larger bags can be left securely at the Cabrillo Mole. Gratuity for your guide is not included but is accepted and greatly appreciated!

Restrictions:  For your safety, you should be in good health & free from high blood pressure, heart, neck or back problems, motion sickness, or other conditions that could be aggravated by this tour. Please note all guests must be able to use ramps and stairs to enter and exit the Sea Wolf. There are steep stairs up and down between the dock and the seating area on board the boat.


Where to Meet

Undersea Semi-Submersible Expedition
Green Pleasure Pier, Avalon, CA 90704

Get Directions

Have questions? Here's the most frequently asked.

While a reservation is not required, it is recommended.  There are a limited number of seats and they do sell out.

Yes, restrooms are located at the base of the Green Pleasure Pier.  Please make sure to use them before you check-in.  There is a restroom on board the semi-submersible for emergencies, however it is recommended that you use the restroom before you board the boat.

Walking time to common locations:

  • Cabrillo Mole Area: 7-10 minutes
  • Basketball/Volleyball/Old Ben Park Area: 3-4 minutes
  • Green Pleasure Pier/Island Tour Plaza: 1-2 minutes
  • Casino Building: 10-15 minutes
  • Descanso Beach: 15-20 minutes

Due to the nature & brevity of this tour, food & beverage is not provided or permitted on tour.  Guests can bring a bottle of water with them, if they would like.

Still have questions?   Visit our FAQ page to submit your own

"This tour consists of climbing onto a mock submarine and then sitting below sea level while the "submarine" took us to Lover's Cove Marine Preserve. The view out the portholes is AWESOME and when the crew fed the fish, the frenzy of fish at our window was amazing."

- BeawChan from Dormont, PA - TripAdvisor
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