For more than 30 years, Catalina Adventure Tours has been giving guests an unforgettable way to explore Catalina Island’s underwater world—no scuba gear required. Aboard our bright yellow, custom-built semi-submarine Nautilus, you’ll descend into a spacious viewing cabin featuring oversized circular windows designed for crystal-clear marine life sightings. Relax in comfortable seating as schools of colorful fish glide past just inches away, offering a front-row seat to nature at its finest.
What truly sets the Nautilus apart is its interactive fish-feeding system, operated by torpedo-style buttons right from your seat (available for an additional charge). This creates incredible, up-close encounters you simply can’t experience in an aquarium. Departing from the Green Pier in Avalon, tours run multiple times daily to the protected waters of Lover’s Cove Marine Preserve, where visibility can exceed 100 feet and thriving marine life grows undisturbed in this no-take zone.
Looking for something extra special? Seasonal evening tours reveal Catalina’s nocturnal sea creatures using the semi-sub’s custom lighting system—transforming the darkness into a glowing underwater spectacle. Day or night, the Nautilus Semi-Submarine Adventure delivers an immersive, one-of-a-kind experience you’ll remember long after you surface.
