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
October 6th, 2024
Upon arriving from a long bus ride from Cabo San Lucas to La Paz, we were greeted by the crew of Under Sea at the dock and transported in their RIB (Rigid Inflatable Boat) to the mother ship, it was already dark and we could not yet appreciate our surroundings. We were greeted onboard by […]
October 3rd, 2024
“We had a great day of diving on Day 2 of the Sea of Cortez adventure! Our first dive at Las Animas we saw a school of 20+ hammerheads, sea lions, and a super active octopus on the reef! We continued diving around the area, seeing hammerheads on 3 out of 4 dives along with […]
October 2nd, 2024
“Floating slowly along with the current, looking for tiny creatures in the coral, suddenly a large body zooms past the side of your mask: it is one of several playful sea lion pups coming to investigate the other large mammals blowing bubbles near their rookery. Curious and unafraid, they dive, pirouette and change direction in […]
September 27th, 2024
“A simple way to sum my experience up would be simply put: a trip of a lifetime. I feel so incredibly grateful to be in a position where I am able to explore such a beautiful part of the world. To experience it all with world class service has truly been a gift. I have […]
September 25th, 2024
“I am so happy my friend told me to come on this trip. I have been on one liveaboard dive trip before and this one was significantly better. The diving took us to an amazing variety of places. There were manta rays interacting with us, large schools of giant hammerheads, sea lions to play with […]
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 […]
