During our transit to Guam, our new EM304 sonar mapped a swath to the full depth of this section of the #MarianaTrench, with the deepest depth observed being 9,413 meters. Figure by Hayley Drennon, generated with QPS maritime software solutions Quimera

OET welcomes Jhen Allison Seguiwan as a #seafloormapping intern. As an undergraduate at Southern Utah University, Jhen's research keeps her connected to her home in #AmericanSamoa and to passion for protecting coastal and marine ecosystems. Learn more in her #QandA blog: bit.ly/4oyECBG

NEW TIME!: Join us for a Live Q&A event and hear from the avian biologists onboard #EVNautilus about their shipside #seabird and biodiversity surveys! Tune in and submit questions in real-time at nautiluslive.org

It's #NationalMegalodonDay! Learn more about the fossilized #megalodon tooth we sampled in 2022 and how scientists study these samples through our #blog: bit.ly/4eujmsl

With our new EM304 multibeam sonar upgrade, we can map deeper and more efficiently than ever before! This is especially critical as we will be exploring some of the deepest parts of the ocean in 2026. Learn more in our #blog: bit.ly/4etrb2F

OET warmly welcomes Jhen Allison Paguiligan Seguiwan, a student at Southern Utah University, to our NA178 Pacific Mapping expedition as a #seafloormapping intern! Learn more about Jhen, from #AmericanSamoa, via Samoa News: bit.ly/4uquVqm

Happy #WorldOceansDay! We're thrilled to launch our 2026 #oceanexploration season soon and to share our discoveries of the global ocean with the world through live streaming at NautilusLive.org. Learn more about the 2026 season via The Guam Daily Post: bit.ly/3RKYV2R

In 2026, #EVNautilus will embark on 5 expeditions across the Pacific, from the biodiverse waters of the Hawaiian archipelago to the ancient volcanic depths of the #MarianaIslands and beyond, partnering with community and scientists to test new technology. Watch video: www.youtube.com/watch?v=-v9j...

OET is proud to welcome Adolfo Rodríguez Velázquez from #PuertoRico to our 2026 #ScienceCommunicationFellow cohort! Learn more about this #sciencecommunicator and professor from the UPR Cayey via Primera Hora: www.primerahora.com/noticias/pue...

OET proudly welcomes Sabrina Medina, Education Program coordinator with Maui Ocean Center Marine Institute, to our 2026 #ScienceCommunicationFellowship cohort! Learn more via @mauinow.com: bit.ly/3Sf2zBY

Happy #WorldReefDay! #DidYouKnow that much of Earth's reefs are actually found in the #deepsea? While exploring unknown regions of our global oceans, OET uses our remotely-operated vehicles to shine a light on these dark-dwelling corals and share their wonder with the world.

The #CorpsofExploration aboard #EVNautilus are officially in shakedown! This is a pre-season period during which we test all the technology and equipment on the ship to prepare it for the fieldwork ahead. Stay tuned as we gear up for the 2026 season!

In 2026, Ocean Exploration Trust and its partners will explore deep-sea habitats in the Central and Western Pacific over five expeditions. Learn more in our blog: bit.ly/4dHyy4T The 2026 E/V Nautilus expeditions are primarily sponsored by NOAA Ocean Exploration via the OECI.

Congrats to 2026 Lead #ScienceCommunicationFellow Kim Etsitty from Navajo Pine High School, who will be returning to #EVNautilus this year! Learn more via The Tri-City Record: bit.ly/4uflVVR

Ocean Exploration Trust's 2025 field season took #EVNautilus across the Pacific, with seven multi-disciplinary expeditions exploring some of the region’s most underexplored waters. Read our 2025 Field Season Report here: nautiluslive.org/science/publ...

Piece together the wonders of the deep sea and the ROV that sees them with these multi-difficulty #puzzles, building teamwork skills, patience, and problem-solving skills with these printable #puzzles: bit.ly/42byll6

After reviewing hundreds of competitive applications, OET is excited to announce the nineteen participants selected to join our upcoming Nautilus expedition season as part of the #ScienceandEngineeringInternshipProgram! Congratulations: bit.ly/48MoTIE

Over the years, while exploring the #deepsea, our Corps of Exploration has been fortunate enough to witness (and even sometimes sample) fossilized #sharkteeth. Learn more about our observations and collections of fossilized #shark teeth in this #blog: nautiluslive.org/blog/2026/04...

It's #NationalDolphinDay! Take a look back at our 2022 #FromShoretotheAbyss expedition with the National Geographic Society. Together, the team tested new technology to study cetacean vocalization in the waters of Maui, Lanai, and Hawai’i Island: www.youtube.com/watch?v=mWAV...

Congrats to former #ScienceCommunicationFellow Matthew Holden on being awarded the Robert E. Yager Foundation Excellence in Teaching Awards from the National Science Teaching Association! bit.ly/4vpthXO

Who doesn’t love a #DumboOctopus? This one was spotted during a 2019 dive on Kingman Ridges. Dumbos are known for having prominent ear-like fins that extend from the mantle above each eye. Did you know dumbo octopus refers to not one, but a whole genus of umbrella-armed species.

Former OET #ScienceCommunicationFellow Ariel Waldman's new series "Life Unearthed" premieres on April 1 on PBS. Learn more: www.pbs.org/show/life-un...

We're excited to share our 2026 expedition season map as a preview for the upcoming year of exploration! Stay tuned for more information on what's next for #EVNautilus!

We want to extend our deepest congratulations to OET Founder Dr. #RobertBallard for being honored with the Pathfinder-class oceanographic survey ship USNS Robert Ballard in his name. Learn more: bit.ly/4uDDUGb

#WereHiring! OET is looking for a Production & Design Coordinator to join our Education and Outreach Team in a remote, full-time position. Share the wonder of ocean exploration through video production, social media, web outreach, and campaigns! nautiluslive.org/about/employ...

Are you looking for some #ocean themed books for #ReadAcrossAmerica? Check out our reading list: nautiluslive.org/resource/rec...

We invite you to celebrate #ComputerScienceEducationWeek with our #STEMLearningModule "Codes and Controlling." Use this easy-to-follow module to teach students hardware, software & #coding basics using an Arduino microcontroller: bit.ly/4rFsGQ5 #ComputerScience #LearntoCode

Your artwork could go on an ocean adventure aboard #EVNautilus! Students ages 5 to 18 can submit artwork for consideration for the official Nautilus Expedition Season Stickers and Patch to be worn and displayed by members of the #CorpsofExploration. Learn more: bit.ly/47LODnm

#PublicationAlert! A recent paper describes seven new species of Lepidonotopodini #scaleworms from deep-sea chemosynthetic ecosystems, including some samples collected by #EVNautilus in the #Galapagos in 2015. Read it in Marine Biodiversity here: bit.ly/4ofrhws

A new species of a tiny deep-sea limpet reveals big secrets of the deep sea! New study from Professor Gonzalo Giribet's lab describes an exciting find from the 2023 @nautiluslive.org expedition to the remote Johnston Atoll

Your artwork could go on an ocean adventure aboard #EVNautilus! Students ages 5 to 18 can submit artwork for consideration for the official Nautilus Expedition Season Stickers and Patch to be worn and displayed by members of the #CorpsofExploration: Learn more: bit.ly/47LODnm

In 2025, E/V Nautilus and the Corps of Exploration spent six months exploring the Central, Western, and Southern Pacific, mapping unsurveyed seafloor, and bringing new views of never-before-seen seafloor to the world. youtu.be/oz0x4xQ_Ivk?...

Happy #WorldJellyfishDay! Which OET #jellyfish sighting is your favorite?

#NewBookAlert! #CorpsofExploration member Jon Willis's new book "The Pale Blue Data Point: An Earth-Based Perspective on the Search for Alien Life" includes some of his experience sailing on #EVNautilus in search of unique #deepsea habitats. Learn more: bit.ly/4od4mTh

During the NA176 expedition, our team encountered a wealth of biodiversity, including many gorgeous #GlassSponges. In this video, you’ll get up close and personal with some of them. www.youtube.com/watch?v=2OEW...

Is it a butterfly doing a backstroke? You may not know it, but this deep-sea #isopod is a rare sight! Scientists still have much to learn about the long-limbed crustacean #Bathyopsurus, as only a few specimens (of only two species) have been collected. www.youtube.com/watch?v=qOBz...

Have you ever heard of a #lizardfish? Our Corps of Exploration came across this #HighfinLizardfish (Bathysaurus mollis) at over 4,700 meters (15,400 ft) deep while exploring the abyssal plains in the deep sea around the #CookIslands. www.youtube.com/watch?v=pFyz...

#TBT with @bizarrebeastsshow.bsky.social as they discuss some of the "blobby"-est creatures, including some witnessed by OET during our exploration: www.youtube.com/watch?v=sb9j...

We encountered this #BigfinSquid (genus Magnapinna) over 5,100 meters deep while exploring the abyssal plain in the waters of the #CookIslands. They are rarely ever seen by humans and are the only squid known to live as deep as the hadal zone. www.youtube.com/watch?v=7UvS...

Sail onboard #EVNautilus in 2026 with a PAID internship! We're accepting applications in four categories: #OceanScience, #RemotelyOperatedVehicle #Engineering, #VideoSystemsEngineering, and #SeafloorMapping/Hydrography! Learn more and apply by January 4, 2026: nautiluslive.org/join/interns...

For the NA176 expedition, we set out to explore the deep waters surrounding the Cook Islands. In this photo album, you'll see some of the many biological highlights in photographs captured using the 4K imaging system on the MxD SeaCam: bit.ly/4nWSjJS.

Spotted: a dumbo octopus (Grimpoteuthis genus) on the abyssal plain in the waters of the #CookIslands, over 5,000 meters deep. Watch for a gorgeous look at the underside of this octopus, including the rows of suckers on its eight tentacles. www.youtube.com/watch?v=Yc0U...

For the first time this season, the team aboard #EVNautilus is exploring the deep sea with the help of #ROVLittleHercules. Working in tandem with ROV Atalanta, Little Hercules is an imaging-vehicle capable of reaching more than 90% of the world's ocean floor. www.youtube.com/watch?v=FtJq...

#SeaCucumbers are essential to the cycling of nutrients of the #seafloor, gathering, processing, and depositing out ocean food! These squishy superheroes are major players in storing carbon and an ocean system that stabilizes the whole planet's climate. www.youtube.com/watch?v=81Q5...

Happy #HagfishDay! We found this #hagfish inside a sponge while exploring Monterey Bay National Marine Sanctuary in 2018. The #Pacifichagfish (Eptatretus stoutii) is a slender, slimy, primitive fish found in cold waters worldwide.

Our #CorpsofExploration witnessed this #CasperOctopus from the suborder Incirrata while exploring a series of knoll hills in the central region of the #CookIslands' waters while diving over 4,100 meters (13,000+ feet) deep www.youtube.com/watch?v=bNjQ...

Spooky season must be here because while exploring the seafloor in the Cook Islands, our team came across these two eerie but amazing #facelesscuskeels (Typhlonus nasus). Navigating the world guided by their large nostrils, Typhlonus #eels live as deep as 5,100m. www.youtube.com/watch?v=d3nC...

Happy #WorldOctopusDay! Our #CorpsofExploration spotted this #dumbooctopus in 2021 while exploring an unnamed Seamount near the Chautauqua Seamounts, some 150 miles west of Kaua’i. #octopus #NautilusLive

During the NA176 expedition, OET is partnering with Deep-Sea Power & Light to field test a new ultra-high resolution video camera on #ROVHercules and #ROVLittle Hercules: the MxD SeaCam cutting-edge 4K imaging system. Learn more in our #blog: bit.ly/4npOQ62

During NA175 mapping the waters of the Central #Pacific, the team aboard #EVNautilus had the privilege of connecting with NASA - National Aeronautics and Space Administration #Astronaut (and #CorpsofExploration member) Zena Cardman on the #InternationalSpaceStation. www.youtube.com/watch?v=42-2...