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Experience Catalina Island’s marine life on a 45-minute undersea cruise with live narration, porthole viewing, and a climate-controlled cabin for $52 per person.

The Undersea Expedition: Catalina Island Tour offers a 45-minute journey beneath the Pacific waters surrounding Catalina Island for just $52 per person. Departing from Green Pleasure Pier in Avalon, this semi-submersible tour provides a comfortable, climate-controlled environment to observe marine life through individual portholes. With a rating of 4.5 out of 5 based on 99 reviews, it remains a popular choice for visitors interested in marine ecosystems without the physical effort of snorkeling or diving.
This tour is ideal for families, first-time visitors, or those who want a relaxed way to enjoy the ocean’s vibrant marine life. Its live commentary enhances the experience by explaining the environment and the creatures you see, making it both educational and entertaining. The tour’s flexible departure times throughout the day ensure that most travelers can find a convenient slot, but booking 8 days in advance is recommended due to its popularity.
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The tour begins at Green Pleasure Pier in Avalon, a well-known spot in Catalina Island. From here, travelers board the semi-submersible vessel that gently glides five feet below the surface. The boarding process is straightforward, and the ship is equipped to host up to 35 travelers, providing an intimate viewing experience.
The pier location makes this tour accessible for most visitors, especially those staying in Avalon. The meeting point offers restrooms at the pier’s base, so travelers are encouraged to use facilities before check-in, as there are no restrooms onboard the vessel. The tour ends back at the same meeting point, completing the circuit without the need for additional transport.

Once aboard, each passenger finds their own seat with a personal porthole designed for optimal viewing. The cabins are climate-controlled, so comfort is maintained regardless of weather conditions. For those interested in different perspectives, passengers are free to walk around the cabin, gaining multiple viewpoints of the underwater environment.
This setup ensures that even those sensitive to seasickness or adverse weather can enjoy the tour in comfort. The cabin’s design helps minimize external noise, although some reviews mention that the audio system for the live narration can be somewhat outdated, making it occasionally difficult to hear the guides clearly.

During the 45-minute cruise, the vessel glides over kelp forests and areas populated with various fish species. The guides provide live commentary about the marine environment, highlighting notable species and underwater features.
A common highlight is observing fish swarm around the boat, especially when guides feed the fish right beside the vessel, ensuring plenty of sightings. Passengers often see kelp forests, which add to the visual beauty and ecological interest of the tour. The boat also offers up on deck views near the end of the trip, offering a chance to enjoy panoramic views of Avalon Harbor and the island’s coastline.

The individual portholes are the main feature that sets this tour apart. They allow close-up views of schools of fish, and the ability to see marine creatures in their natural habitat. Reviewers frequently mention how close the fish get to the windows during feeding times, creating a captivating scene.
The feeding frenzy often occurs right in front of the windows, providing an exciting spectacle that is both lively and educational. The guide’s narration helps identify different species and explains their behaviors, adding context to the visual display.

The crew on board includes a captain and deckhand-guide, who are praised for their knowledge and friendliness. The guides answer questions and share interesting facts about the Pacific Ocean’s marine ecosystems. Multiple reviews highlight the entertaining and informative narration, which enhances the overall experience.
While the guides are appreciated for their expertise, some reviewers note that the audio system could benefit from an upgrade to improve clarity. Despite this minor issue, the guides’ personalized approach and willingness to engage make the tour more enjoyable.

Along With the porthole views, passengers are encouraged to walk around the cabin for different vantage points. Near the end of the cruise, passengers can step up on deck to enjoy views of Avalon and the coastline. These deck views provide a different perspective, especially for photos of the harbor and the surrounding scenery.
The up on deck experience is a nice bonus, allowing travelers to take in the scenic beauty of Catalina Island after spending time observing marine life through the windows.

The tour lasts approximately 45 minutes, making it a quick yet engaging activity. Since restrooms are not onboard, it’s recommended to visit facilities at the base of Green Pleasure Pier before check-in. Travelers who are sensitive to seasickness should consider that the vessel is semi-submersible—less movement than a full boat, but some may still experience discomfort.
Booking in advance is highly recommended because the tour is generally booked about 8 days beforehand. This ensures availability, especially during peak times in Avalon. The tour operates rain or shine, but cancellations due to poor weather are possible, in which case a full refund or rescheduling is offered.
This semi-submersible expedition is one of the most direct ways to see Catalina’s underwater habitats without snorkeling or diving. Its affordable price of $52 and short duration make it accessible and appealing.
Guests who have also considered other options like scenic tours, golf cart rides, or inland adventures often find this tour an ideal complement, especially if they want a relaxing, educational activity focused on marine wildlife.
While the tour is widely praised for its marine sightings and friendly crew, some reviews mention last-minute cancellations and booking issues involving third-party providers like Viator. It’s important to confirm reservations directly or through reputable sources.
Plus, the audio system for narration has been described as outdated, sometimes making it hard to clearly hear the guides. Travelers who prefer a highly audible and immersive narration may find this aspect less satisfying, but overall, the knowledgeable guides compensate with their engaging storytelling.
This tour appeals to families with children, marine life enthusiasts, and those seeking a relaxing activity with scenic views. It’s perfect for visitors who want to see marine creatures up close without the hassle of scuba gear or swimming.
Adventure seekers looking for a more active underwater experience might prefer snorkeling or diving, but for a gentle, educational, and accessible way to explore Catalina’s waters, this tour hits the mark.
The 45-minute semi-submersible tour offers an affordable, comfortable, and informative way to see Catalina Island’s marine environment. Its personal portholes and live narration create an engaging experience, especially for families and first-time visitors. The ability to enjoy the ocean’s colors and creatures without getting wet makes it an accessible choice for most.
While booking early is wise, and some might find the audio system could improve, the overall experience remains highly rated and worthwhile. The friendly crew and spectacular underwater views make this tour a notable highlight for those wanting to connect with Catalina’s natural beauty.
“Had a great time ,staff was very nice . my grandkids loved it and they saw tons of fish , would highly recommend it”
How long is the tour?
The tour lasts approximately 45 minutes.
Where does the tour start?
It begins at Green Pleasure Pier in Avalon.
What can I see during the tour?
Expect to see fish, kelp forests, and other marine life, especially during feeding times.
Is this tour suitable for children?
Yes, it is suitable for most travelers, including families with children, as it offers a relaxed, seated experience.
Are there any physical requirements?
No significant physical effort is needed, but the vessel is semi-submersible, so those sensitive to seasickness should prepare accordingly.
Can I cancel or reschedule?
Yes, free cancellation is available if done at least 24 hours in advance. Poor weather may lead to cancellations with a full refund.