



Descend 5 feet beneath the surface of one of California’s most extraordinary marine ecosystems, all from the comfort of your own personal porthole in our semi-submersible. Gaze at Giant Kelp forests rising from the ocean floor as large schools of calico bass, bright orange garibaldi, and the occasional diving cormorant or seal pass by to say hello. The top of the boat always remains above the surface in case you need to head upstairs for some fresh air! Our captain also offers a harbor cruise on the ride back to the dock so you can look for dolphins and enjoy the ocean breeze while taking in the stunning views of Avalon.
Boat By
Tour starting location Gate C
Reviews collected by Viator and Tripadvisor
All sales are final. No refund is available for cancellations.
Undersea Expedition: Catalina Island Tour lasts about 45 min. The itinerary has 2 stops.
Prices start at $53 per person for this Catalina Island experience, booked through Viator with the price shown before checkout. There is 1 booking option, so the final price depends on the option you choose.
All sales are final. No refund is available for cancellations.
The meeting point is Line C, left hand side of the Pier. Hotel pickup is not part of this experience.
The experience is available in EN.
It is a small-group experience with a maximum of 20 participants.
Infants are required to sit on an adult’s lap
Yes, bookings are confirmed instantly.
Travellers rate it 4.4 out of 5 across 137 reviews on Viator and Tripadvisor; it is run by Santa Catalina Island Company.
Reviews collected by Viator and Tripadvisor
| Tour | Duration | Rating | Price | |
|---|---|---|---|---|
Undersea Expedition: Catalina Island Tour | 45 min | 4.4 (137) | $53 | |
Catalina Island Day Trip from LAX area hotels with Undersea Adventure | 12 hours | 3.0 (3) | $198 | View |
Catalina Island Private Guided Golf Cart Tour of Avalon | 2 hours | 4.9 (652) | $303 | View |
Catalina Island Day Trip from Los Angeles with Optional Upgrades | 8–12 hours | 1.0 (1) | $182 | View |
Catalina Island City and Scenic Mount Ada Tour | 50 min | 4.4 (176) | $46 | View |
From LA: Catalina Island with Zipline Tour and Hotel Pickup | 8–10 hours | 4.6 (13) | $338 | View |
Catalina Island Ferry from Newport Beach to Avalon | 1h 15min | 4.1 (154) | $47 | View |