A research expedition off the coast of Brazil has documented more than 30 new deep-sea species, from translucent worms to bioluminescent jellyfish, using shipboard imaging tools that allowed scientists to study living animals in real time rather than waiting months for lab-based analysis. The Monterey Bay Aquarium Research Institute developed several of the key instruments, including a three-dimensional laser scanner and a deep-water particle imaging system. The findings raise a direct question about how ocean biodiversity surveys will work going forward: whether portable, high-resolution imaging can replace the traditional cycle of collecting specimens at sea and identifying them on land.
How shipboard imaging changed the species count off Brazil
The central development here is not just the species tally but the method behind it. Traditional deep-sea taxonomy follows a slow pipeline. Researchers collect organisms, preserve them, ship them to museums, and then spend months or years comparing physical features and genetic sequences before publishing a formal description. This expedition compressed part of that process by bringing advanced imaging directly onto the research vessel and integrating it with an AI-assisted workflow described in MBARI’s expedition summary.
Three instruments did most of the work. EyeRIS, a real-time three-dimensional imaging system built around a multi-lens design and laser optics, captured detailed external morphology of fragile organisms that would normally collapse or distort during preservation. According to MBARI’s EyeRIS overview, the system measures structure and morphology at a resolution fine enough to distinguish species-level features while animals are still alive. That capability matters because many gelatinous deep-sea creatures lose their diagnostic shapes within minutes of being brought to the surface, making later comparisons difficult or impossible.
A second system, DeepPIV, projects a thin laser sheet into the water column while a camera records how particles and fluid move around an organism. As outlined on the DeepPIV technology page, the tool quantifies filtration rates and carbon flux by tracking particle motion through and around gelatinous structures. This means researchers can observe not just what an animal looks like but how it feeds and interacts with the water surrounding it, data that would be impossible to reconstruct from a preserved specimen in a laboratory dish.
The third instrument, Squid, is an open-source confocal microscope developed at Stanford University’s Prakash Lab. It enables live three-dimensional imaging of internal cellular structures at sea, even on a moving ship. Confocal microscopy normally requires a stable laboratory with vibration isolation, making its deployment offshore a significant technical step. By examining cells and tissues while organisms were still alive, the team could gather anatomical data that supplement and sometimes partially replace the need for genetic sequencing as a first diagnostic step, especially for distinguishing closely related forms.
What 31 new species tell us about mid-water blind spots
The sheer number of previously unknown organisms found during a single expedition points to how little systematic survey work has been done in the deep waters off Brazil. Karen Osborn, a Smithsonian National Museum of Natural History researcher and MBARI collaborator, helped frame the expedition’s scope in institutional accounts, emphasizing that many of the animals encountered had never been documented in this region. MBARI engineer Kakani Katija and colleagues described how the imaging and AI systems shaped the team’s workflow, allowing them to flag unusual morphologies quickly and return to promising areas for additional sampling.
The expedition tied directly to MBARI’s Bioinspiration and Biodiversity programs, which study how deep-sea organisms have evolved solutions to problems like low-light vision, drag reduction, and energy-efficient filtration. Each new species is not just a line on a checklist but a potential source of biological design data. The ghostly worms and glowing jellies referenced in early reports occupy the mid-water column, a zone between roughly 200 and 4,000 meters deep that contains the largest living space on Earth by volume yet remains one of the least explored. Many of these animals are gelatinous and fragile, which historically has made them hard to collect and harder still to describe.
Carbon cycling is one reason this gap matters to people who never plan to visit the deep ocean. Gelatinous organisms in the mid-water zone filter enormous volumes of seawater, packaging organic carbon into dense particles that sink toward the seafloor. DeepPIV’s ability to measure filtration rates in situ means scientists can start quantifying how much carbon these animals move out of the upper ocean, a variable that climate models currently estimate with wide uncertainty bands. Without species-level data on who is doing the filtering and at what rates, those estimates stay rough, and the role of mid-water biodiversity in regulating climate remains under-characterized.
The new species also highlight how regional oceanography shapes life in the water column. Off Brazil, interacting currents, river outflows, and eddies create layers of different temperature and nutrient content. The expedition’s imaging systems revealed distinct communities of animals associated with these layers, including forms that appeared only within narrow depth bands. High-resolution morphology and behavior data from EyeRIS and DeepPIV help researchers link species to specific physical conditions, a connection that is difficult to establish when data come only from preserved specimens and sparse environmental measurements.
Provisional diagnoses at sea versus shore-based confirmation
The expedition’s design tests a specific idea: that combining EyeRIS morphology scans with Squid shipboard confocal imaging can increase the proportion of new species that receive provisional diagnoses while still at sea, rather than only after shore-based genetic sequencing. If that proportion rises meaningfully, it changes the economics and speed of biodiversity surveys. Expeditions become more productive per day of ship time, and researchers can make real-time decisions about where to focus additional sampling, which depths to revisit, and which organisms deserve priority for preservation.
There are clear limits to what shipboard imaging can settle. Formal species descriptions still require genetic confirmation, and the expedition’s collected samples now await sequencing and detailed taxonomic review. No specimen accession numbers or ZooBank registration details have appeared in the institutional sources released so far, underscoring that the work remains at a provisional stage. The gap between a field diagnosis and a published, peer-reviewed species description can still span years, particularly for groups with few specialists.
Yet the ability to capture high-quality three-dimensional morphology, internal anatomy, and behavior in real time narrows that gap in several ways. First, it generates a permanent digital record of each organism in life, which taxonomists can revisit long after the physical specimen has degraded. Second, it allows multiple experts around the world to examine the same individual remotely, accelerating consensus on whether a form is genuinely new or a variant of a known species. Third, it supports automated pattern recognition: AI tools can scan EyeRIS and DeepPIV datasets for unusual shapes or behaviors, flagging candidates for closer human scrutiny.
For regions like the Brazilian offshore, where ship time is scarce and logistical costs are high, this shift is particularly significant. Instead of returning to port with collections whose importance will only be clear months later, scientists can leave the field with an initial map of local biodiversity, a prioritized list of taxa for genetic analysis, and a set of hypotheses about ecological roles. Over time, as more expeditions adopt similar tools, those digital records could form the backbone of a global, open-access atlas of deep-sea life, built not just from preserved specimens but from detailed portraits of animals in their native environment.
The Brazil expedition demonstrates that such an approach is technically feasible and scientifically productive. More than 30 candidate new species, many from a single stretch of mid-water habitat, suggest that the deep ocean still holds vast uncharted diversity. High-resolution imaging at sea will not replace genetics or museum collections, but it can make every hour of exploration count more. In a part of the planet where most inhabitants are still unnamed, that efficiency may be the difference between documenting ecosystems in time and watching them change unseen.
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*This article was researched with the help of AI, with human editors creating the final content.
