Have you ever wondered what truly lies beneath the ocean’s surface, in realms where sunlight never reaches? The deep sea, a vast and often mysterious frontier, holds an astounding wealth of hidden wonders. From the most spectacular creatures drifting in perpetual darkness to otherworldly ecosystems blossoming from the seafloor, countless new discoveries are made annually, each bringing humanity closer to understanding this remarkable environment. The video above offers a compelling glimpse into this world, highlighting the critical role of innovation and technology in these explorations.
The Evolution of Deep-Sea Exploration Technology
For over a century, the options available to scientists for sampling deep-sea creatures were notably limited. Historically, it was understood that a trawl net was deployed, towed by a ship, and then hauled aboard, bringing creatures onto the deck for collection. However, many open ocean inhabitants are known to be small, remarkably fragile, and often gelatinous, meaning the specimens yielded by these methods frequently appeared damaged or incomplete. Imagine if the only way to study a butterfly was by catching it in a bulldozer – much vital information would be lost.
The development of remotely operated vehicles (ROVs) in the late 20th century represented a profound shift. These robotic submersibles finally allowed for cameras and samplers to be sent directly into the deep-sea environment, enabling observations of marine life in their natural state. Such advancements transformed oceanographic research, with ROVs serving as humanity’s eyes and instruments becoming our arms in a world previously inaccessible. Our understanding of the oceans has since been advanced more than ever before through these technological leaps.
Introducing ROV Subastian and the Schmidt Ocean Institute
Among the pioneers in this field is ROV Subastian, a state-of-the-art remote operated vehicle built in 2015. This advanced submersible is owned and meticulously operated by the Schmidt Ocean Institute, a non-profit oceanographic research foundation dedicated to fostering deep-sea research and technology since its inception in 2009. The Institute’s commitment to scientific discovery is clearly demonstrated through its ongoing missions aboard the research vessel RV Falkor.
Tethered to the RV Falkor, Subastian possesses the capability to reach extraordinary depths, extending down to 4,500 meters (nearly 2.8 miles) below the surface. At these extreme pressures and temperatures, it opens a literal window into another world. Its dives often illuminate environments that would otherwise remain hidden, bringing back invaluable data and breathtaking footage.
Unveiling Unique Deep-Sea Ecosystems: The Auka Vent Field
As Subastian commences its descent, the fading light of the sun is gradually replaced by the stark blackness of the deep, where the ROV’s powerful lights become the sole source of illumination. A prime destination for its exploration is often a system of hydrothermal vents, such as the fascinating Auka Vent Field, located within the Pescadero Basin in the Gulf of California. The vent fields found in the Pescadero Basin are considered distinct from all other known vent systems globally.
One particular field, for example, exhibits a remarkable underwater cavern where hot fluid collects at the ceiling, forming a reflective surface that strikingly resembles an upside-down lake. The biodiverse life supported by these vents, meticulously captured by Subastian’s cameras, is equally unique. In the absence of sunlight, animals in these regions must rely on microbes that generate energy through chemosynthesis, a process where dissolved minerals are converted into essential nutrients. Many species form symbiotic associations with these microbes, like the Oasisia tube worms, which are found to be uncharacteristically common in this specific region.
For these complex missions, ROV Subastian is comprehensively outfitted with a diverse suite of sensors and an impressive array of advanced equipment. When rocks or sessile organisms are encountered on the seafloor, manipulator arms are precisely used to collect specimens, which are then securely stowed in specialized crates mounted at the front of the vehicle. A suction sampler can even be deployed to gather the sprawling bacterial mats that often surround the towering structures of superheated water, providing crucial insights into these extreme environments.
The Midwater Enigma: Earth’s Largest Underexplored Ecosystem
Despite these significant technological advancements, one particular region of the deep sea has historically presented formidable challenges for sampling: the midwater. This vast expanse encompasses the space between the sunlit surface waters and the dark seafloor far below. The midwater is thought to be home to Earth’s largest ecosystem and is populated by a community of often gelatinous animals that likely outnumber all other life on the planet. Yet, paradoxically, it remains one of the least explored environments on Earth.
When it comes to investigating the ocean’s midwater, traditional ROVs have achieved only limited success in collecting its delicate specimens. Imagine trying to catch a cloud without disturbing its form – this is the challenge faced by marine biologists in the midwater. Consequently, a wealth of critical information regarding the diet, life cycles, and ecological significance of these organisms is still largely missing. This scientific gap, however, is now on the brink of being significantly narrowed.
Pioneering Midwater Technologies: Designing the Future Two
In a pivotal move for their 2021 Designing the Future Two mission, the Schmidt Ocean Institute explicitly shifted its focus to the intricate world of the midwater. This mission deployed three revolutionary new systems, which had been initially tested in 2019, with the overarching goal of making midwater sampling both more efficient and, critically, less intrusive for the animals involved. This innovative approach recognizes the extreme fragility of midwater organisms.
Studying the midwaters, the expansive region connecting the sea surface to the seafloor, has long been a significant hurdle due to limited access and study methods. As Brennan Phillips, a participant in the mission, explains, approaching animals in the midwater to obtain high-quality images and samples is incredibly difficult. It is described as a zero-gravity, three-dimensional environment where both the animal and the ROV are in constant motion, creating complex dynamics. The simultaneous deployment of multiple advanced systems is considered a rare and staggering achievement, allowing an unprecedented amount of data to be gathered in a short timeframe.
Advanced Imaging: DeepPIV and EyeRIS
One of these groundbreaking new systems is known as Deep Particle Image Velocimeter, or DeepPIV. This technology is expertly designed to capture the motion of suspended particles by employing a continuous laser sheet and a high-resolution camera. For deep-sea sampling, this capability translates into the full rendering of the 3D structures of midwater organisms without the necessity of removing them from their natural environment. This method allows scientists to collect data that is truly representative of how these often gelatinous and fragile organisms navigate their surroundings, such as the elegant Solmissus jellyfish.
Complementing DeepPIV is another new imaging system called EyeRIS, which offers a very different approach to volumetric or 3D imaging. Unlike DeepPIV, which requires a scan to reconstruct a three-dimensional object, EyeRIS captures the three-dimensional surface of a moving object in a single frame. This allows for all changes in an animal’s movement – for instance, a squid beating its fins or a jellyfish contracting its bell – to be captured at an impressive 60 frames per second. The detail provided by EyeRIS is invaluable for studying the intricate biomechanics of midwater species.
In-Situ Sampling: The Rotary Actuated Dodecahedron (RAD2)
After the extensive imaging and data collection, the Rotary Actuated Dodecahedron, or RAD2, is employed. This device, described as an intriguing exercise in origami robotics, is designed to encapsulate an animal. Once surrounded, small pieces of its tissue can be carefully cleaved off and preserved directly in situ within the environment. This type of sample is crucial for gathering extensive genetic data about the animal, all without requiring its removal from the deep sea.
The RAD2 system represents a significant advancement over traditional methods, which often involved suction samplers or attempts to collect specimens in jars, methods that frequently damaged delicate organisms. The ability to “reach out and grab” a sample with such precision and minimal disturbance has been a long-held aspiration for many midwater biologists. Imagine the possibilities for genetic research when pristine tissue samples can be obtained directly from the deep.
The Revolution of Digital Holotypes
One of the most exciting implications of these new technologies, particularly the combination of DeepPIV’s 3D scanning and RAD2’s tissue sampling, is the possibility of collecting digital holotypes. Traditionally, a holotype is considered the physical type specimen of a species newly described to science. Its morphology and DNA are used as a crucial point of reference for comparison with already known species and to accurately describe the new one. However, what happens when a new species is discovered, but a suitable physical holotype specimen cannot be collected due to its fragility or rarity?
In the challenging field of deep-sea research, this is a common problem. ROV cameras frequently encounter animals new to science in the midwater, perhaps more often than anywhere else on Earth. The ability to obtain all necessary data for describing delicate midwater organisms entirely in situ, without needing to remove the specimen from its environment, is truly revolutionary. Digital holotypes, comprising detailed 3D scans and genetic tissue data, are poised to transform how new deep-sea species are documented and understood, bypassing the limitations of physical collection.
Safeguarding the Deep: Why This Research Matters
While substantial progress has been made, it is understood that a long journey still lies ahead before the elusive nature of the midwater ecosystem and its delicate inhabitants can be fully comprehended. However, as governments and mining companies begin to express interest in the deep sea for its valuable mineral resources, it becomes more important than ever that the delicate balance of the midwater is understood, along with the potential impacts human actions might have on this critical environment.
The ongoing work of the Schmidt Ocean Institute is seen as crucial in pushing the boundaries of technology needed to better understand our deep ocean. As Peter R. Girguis notes, unlike space, the deep ocean cannot simply be observed from afar; new and exciting ways must be developed to provide “eyes and ears” in these depths. These efforts are not merely about discovery; they are about understanding what is happening down there that helps keep our entire planet running.
Since 2013, scientists aboard the RV Falkor have conducted 81 research expeditions, capturing nearly 3,000 hours of footage from ROV dives. An impressive 1,056 new species have been identified from samples meticulously collected during Falkor’s missions. Furthermore, 1,300,000 square kilometers of the ocean floor have been mapped by Falkor since 2012, a distance traveled equivalent to almost 13 times around the world. These statistics powerfully underscore the immense contributions made to deep-sea exploration and scientific knowledge, revealing why continued investment in advanced robotic technology like ROV Subastian is so vital for future understanding and conservation.
Navigating the Abyss: Your Q&A on Robotic Exploration with Schmidt Ocean Institute
What is the deep sea?
The deep sea is a vast, mysterious part of the ocean where sunlight never reaches, holding many hidden wonders and undiscovered life.
What is an ROV?
An ROV, or remotely operated vehicle, is a robotic submersible that allows scientists to send cameras and samplers into the deep sea to observe marine life directly.
What is ROV Subastian?
ROV Subastian is an advanced robotic submersible used by the Schmidt Ocean Institute to explore deep-sea environments down to 4,500 meters.
What is the ‘midwater’ region of the ocean?
The midwater is the vast area of the ocean between the sunlit surface and the dark seafloor, believed to be Earth’s largest and least explored ecosystem.
What are ‘digital holotypes’?
Digital holotypes are a new method of describing new species using detailed 3D scans and genetic data collected in the deep sea, without needing to bring the fragile animal to the surface.