Liveaboard Diving
Socorro. Cocos. Sea of Cortez.
Socorro, Sea of Cortez, Mexico Sardine Run, Cocos Island, San Ignacio Lagoon
We do it all. If there are cool big animals, we want to share the experience with you. Our adventures combine the utmost safety, comfort and luxurious touches with excellence in guest experience. From orcas and mobula rays to super playful dolphins, great whales, 12 species of sharks, giant mantas, and so much more. We cover it all. The only question is which expedition to sign up for next!?
Socorro Island
Giant Mantas, Dolphins & 12 Species of Sharks
Sea of Cortez
Ultimate Whale Sharks
Sea of Cortez
Orca Expeditions
Sea Of Cortez
5 & 7-Night Liveaboard Diving Adventure
COSTA RICA
Cocos – Island of the Sharks
Magdalena Bay
Mexican Sardine Run
San Ignacio Lagoon
The Most Extraordinary Whale Interaction on the Planet
Baja Ultimate Whales
Expedition Yacht & Whale Camp
Your Home at Sea
Our liveaboard diving ships were constructed with careful consideration. Relentless and obsessive attention to safety has been a cornerstone of our business from our very early days in the 1980’s.
Nautilus Explorer
Nautilus Belle Amie
Nautilus UnderSea
Nautilus Gallant Lady
Mango Wind
Nautilus Westerly
What Makes Us Different
01
Safety First
The cornerstones of everything we do: safety, excellence in guest experience, happy staff, and happy crew.
02
Guest Excellence
Excellence in guest experience is all about you. Our focus is to ensure that you as our guest are safe and able to enjoy your vacation to the highest level.
03
Animal encounters
We provide the best opportunities for encounters, which are always conducted with the utmost respect and only on the animals’ own terms. It’s entirely their choice to swim over and check us out.
See what our guests recently have said about Us
Latest Blogs
September 11th, 2024
We had a terrific 2024 mobulas and orca season. We now believe there are at least 3 pods of orcas that are resident year-round in the Sea of Cortez. Not just around La Ventana, but further north as well. In fact, we saw one pod feeding off loreto just yesterday, Sept 10 and then again this […]
September 10th, 2024
The animals of the Mexico Sardine Run are really something—REALLY SOMETHING! How do you describe a giant bryde’s whale appearing 20 to 30 feet away in indigo blue water, gulping its way through poor frightened sardines! Or the sight of super-fast marlin streaking their way around you. Or as happened last December, humpback whale mommas […]
July 26th, 2024
We’ve been diving Socorro since 1978 and have never seen a season like this. Yeah. In the old days, the diving was phenomenal, with stories of 30 giant mantas circling the divers and loads of sharks. Our first boat was the funky old 120 ft wooden Baja Explorador, a converted research boat sans air conditioning (everyone slept […]
July 26th, 2024
Heck yes!! Take yesterday, for example. It was a nice day in late July, the first dive day on an Ultimate Whale Shark expedition to Bahia de Los Angeles. We were anchored off Las Animas, north of La Paz. The warm-up dive was great, with loads of fish and California sea lions. Our guests loved it. For […]
July 26th, 2024
Costa Rica is home to some of the world’s greatest biodiversity, with dense jungles, rainforests, national parks, volcanoes, rushing rivers, spectacular waterfalls, sandy beaches, and of course, beautiful diving, hiking, kayaking and swimming. Experiencing the diving, tropical rainforests and national parks of Costa Rica is something not to be missed. On this expedition, we will spend […]
July 19th, 2024
There is no better way to end a mobula and orca trip. Today, the last day of a trip where it must be said, we have had luck and help from the entire Nautilus team, such as the plane that helps us every day to spot marine life, other ships such as the Nautilus Undersea […]
