Explorer was atRoca Partida

Water Temp75℉/24℃

Visibility100ft/30m

# of divesYesterday: 3

Belle Amie was atEl Canyon

Water Temp76℉/24℃

Visibility80ft/24m

# of divesYesterday: 4

Undersea was atThe Boiler

Water Temp76℉/24℃

Visibility70ft/21m

# of divesYesterday: 4

    Captains Noon Report – Belle Amie May 20, 2018 - - Belle Amie - the divers saw a Marlin, some others saw a school of galapagos with some silver tips underneath
    Captain’s Noon Report – UnderSea May 20, 2018 - - UnderSea - mantas, dolphins, a few hammerheads and galapagos sharks
    Captains Noon Report – Belle Amie May 19, 2018 - - Belle Amie - more than 30 galapagos sharks and lots of white tip sharks, also tunas, all kinds of jacks and a couple of mantas including a baby chevron
    But most of all, mantas! May 21, 2018 - - Every dive has offered us something different but most of all the Mantas. My best dive of the week was on the last day the first dive, we had everything! Mantas, Whale Sharks, at least four different types of Sharks, Dolphins (lots and lots of fish too!) all in the same view point – we have not been disappointed.
    Looking for the “Big Five” aboard the Belle Amie May 20, 2018 - - Mantas appeared in numbers on all the dives then the dolphins showed up and finally two whale sharks. The Mantas put on the most graceful of performances to the whistles and clicks from the dolphins.

Our Values – Our Culture

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 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.

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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.

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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.

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Choose from 3 luxurious, stabilized, ISM safety certified ships

Nautilus Explorer

We custom built our beautiful Nautilus Explorer in 2000 with a laser focus on safety, luxury and the perfect dive boat configuration. Our guests enjoy stabilized crossings on the #1 boat that clients ask for.

Nautilus Belle Amie

Our Nautilus Belle Amie is a new build launched in 2015 . This is the largest ship in our fleet and dwarfs her competition. Guests enjoy the ultra quiet rooms, extreme spaciousness and comfortable, stabilized crossing.

Nautilus Undersea

Formerly known as the Undersea Hunter of Cocos Island fame, our Nautilus UnderSea is one of the most beloved dive boats in the world. After renovations in 2016, the UnderSea gained a full-width superstructure and more!

Latest Blog Posts

looking up at roca partida from the depths, a school of fish blocks out light

But most of all, mantas!

Every dive has offered us something different but most of all the Mantas. My best dive of the week was on the last day the first dive, we had everything! Mantas, Whale Sharks, at least four different types of Sharks, Dolphins (lots and lots of fish too!) all in the same view point – we have not been disappointed.

two divers watch a graceful giant manta ray

Looking for the “Big Five” aboard the Belle Amie

Mantas appeared in numbers on all the dives then the dolphins showed up and finally two whale sharks. The Mantas put on the most graceful of performances to the whistles and clicks from the dolphins.

diver watches a passing giant manta ray

Manta circle safety stop

From a school of 100 Hammerheads on the first day, to the two Mantas who circled us repeatedly for 15 minutes on a safety stop until we had to surface to the whitetips and silvertip sharks – it’s all worth dragging that 7mm wetsuit on.