Captains Noon Report – Undersea January 22, 2019 - - Undersea - What a great way to finish the trip with four dives full of Mantas
    Captain’s Noon Report – Belle Amie January 21, 2019 - - Four large tuna were hunting with the Amberjack and that excited the white tip reef sharks and they came off the ledges. Silver tips were active in the blue. Some guests had three mantas with them as well.
    Captain’s Noon Report – Under Sea January 21, 2019 - - You could clearly see how happy all divers were as soon as they were coming out of water. These mantas were really playful and stayed close to the divers, I even heard some of them saying this was the "best dive ever".
    Mantas and Dolphins Put on a Spectacular Show January 21, 2019 - - My mask was filled with the sight of dolphins and mantas happily interacting with divers for the entire dive.
    Incredible Diversity in the Revillagigedo Archipelago January 18, 2019 - - El Canyon was incredible with the diversity including a school of hammerheads, a few juvenile silvertips, a couple of really big Galapagos sharks, some juvenile Dusky sharks, a few chevron mantas and 2 amazing tiger sharks.



    Captains Noon Report – Undersea January 22, 2019 - - Undersea - What a great way to finish the trip with four dives full of Mantas
    Captain’s Noon Report – Belle Amie January 21, 2019 - - Four large tuna were hunting with the Amberjack and that excited the white tip reef sharks and they came off the ledges. Silver tips were active in the blue. Some guests had three mantas with them as well.
    Captain’s Noon Report – Under Sea January 21, 2019 - - You could clearly see how happy all divers were as soon as they were coming out of water. These mantas were really playful and stayed close to the divers, I even heard some of them saying this was the "best dive ever".
    Mantas and Dolphins Put on a Spectacular Show January 21, 2019 - - My mask was filled with the sight of dolphins and mantas happily interacting with divers for the entire dive.
    Incredible Diversity in the Revillagigedo Archipelago January 18, 2019 - - El Canyon was incredible with the diversity including a school of hammerheads, a few juvenile silvertips, a couple of really big Galapagos sharks, some juvenile Dusky sharks, a few chevron mantas and 2 amazing tiger sharks.

Our Values – Our Culture

Nautilus boats are built for Safety
Built for Safety

Most divers would be shocked if they knew what was going on in the engine room and below decks of many liveaboard diving ships. Safety is not something to ever take lightly. We live and breathe safety with obsessive compliance to our Safety Management System under the watchful eyes of our external auditors. See our passenger and safety certificates here.

Our commitment to safety >

Luxurious Liveaboard Diving
Excellence in Guest Experience

Captain Mike has led the way for the last twenty-seven years in consistent and relentless obsessive attention to detail, and making every trip as excellent as possible. That attention to detail shows up everywhere, from each dive briefing, to the choice of dive sites, to dinner service, to the quality and thread count of our Egyptian cotton bed sheets. We never stop stressing over the details. We never stop trying to do even better.

Our guest experience >

Hostess Marcella pours drinks at the bar
Happy Crew, Happy Ship

A happy crew makes for a happy ship and the very best in guest experience. The men and women on our ships come from around the world and share your passion for Mother Ocean. Every one of our seventy crew and thirty-five shoreside support staff in Mexico and Canada are committed to doing the best they can for you, our guests, and that shines through like a bright beacon of happiness.

Meet our crew >

Choose from 4 stabilized, ISM safety certified ships

Nautilus Explorer 2018
Nautilus Explorer

Canadian shipyard built from the keel up with a thoughtful design intended to support operations from the chilly current swept waters of Alaska to the equatorial heat of Clipperton Island. Recently lengthened to 132 ft, the Explorer was the world’s first SOLAS safety certified dive boat.

Nautilus Belle Amie 2018
Nautilus Belle Amie

The “Belle” is our newest ship, launched in 2015. At 147 feet she is a big, beautiful and very popular liveaboard that is more like a small ship than a dive boat. Guests enjoy ultra-quiet rooms, spaciousness and comfortable, stabilized crossings.

Nautilus Under Sea Liveaboard Diving Ship
Nautilus UnderSea

Formerly the Undersea Hunter of Cocos Island and IMAX fame, the Nautilus UnderSea is one of the most beloved live aboard dive boats in the world. With a new full-width superstructure, enclosed dive deck and lengthened to 105 ft, the UnderSea is perfect for smaller groups of just 19 divers.

Nautilus Gallant Lady near shoreline
Nautilus Gallant Lady

Our new Gallant Lady is beautiful and combines the luxury of a Broward yacht with thoughtful liveaboard dive boat design. This 116 foot yacht features 6 large suites, accommodating 12 guests, and 1700 horsepower along with hydraulic stabilizers, speeding you wherever you want to go.

Real-time Ship Locator

Latest Blog Posts

Dolphins and Mantas put on a show at the Boiler. Photo by Divemaster Mirko

Mantas and Dolphins Put on a Spectacular Show

My mask was filled with the sight of dolphins and mantas happily interacting with divers for the entire dive.

A beautiful manta flying with its remora. Photo by Divemaster Mirko

Incredible Diversity in the Revillagigedo Archipelago

El Canyon was incredible with the diversity including a school of hammerheads, a few juvenile silvertips, a couple of really big Galapagos sharks, some juvenile Dusky sharks, a few chevron mantas and 2 amazing tiger sharks.

A beautiful manta at Socorro. Photo by Jose Carlos Valenzuela

Letters & Blogs from Our Awesome Guests!

A manta bigger than I could imagine stayed with us for 40 minutes, circling the group, getting as close as half a metre from us, from me.