Descubren 57 nuevas especies en las profundidades del cañón submarino Mar del Plata

A team of international scientists gathered at the Universidad Maimónides in Buenos Aires last year to examine what the ocean floor had surrendered. The specimens before them—collected from nearly four kilometers down in the Mar del Plata submarine canyon—told a story of life thriving in conditions most of us will never witness. By the time the Species Discovery Workshop concluded, the researchers had confirmed something remarkable: fifty-seven species previously unknown to science, and five entirely new genera, had been pulled from the Argentine deep.

The material came from a research expedition conducted in August 2025 aboard the R/V Falkor (too), a vessel equipped with a remotely operated vehicle capable of descending to 3,900 meters. The Talud Continental IV campaign, as it was named, targeted the submarine canyon off Mar del Plata—a geological feature that cuts through the continental shelf like a river carved through stone. What the ROV collected there would occupy twenty taxonomists, both Latin American and European, for months of careful analysis.

Initial estimates had suggested around forty new species. The meticulous work of those twenty specialists revised that number upward to fifty-seven. The breakdown reveals the sheer diversity of what lives in that darkness: twenty copepods, those tiny crustaceans that form the foundation of deep-sea food webs; twenty-two echinoderms, a group that includes sea cucumbers and crinoids; fourteen cnidarians—octocorals, sea pens, and stony corals; and a single scaphopod mollusk. Each category represents a different branch of life, each adapted to survive where sunlight never reaches and pressure would crush most surface creatures instantly.

Among the discoveries was a sea cucumber that captured the imagination enough to earn a popular name: Loki, after the Norse god. Formally catalogued as Peniagone sp., the creature bears small horn-like appendages that justify the mythological reference. Researchers also identified new species of sea pens, including Pseudumbellula sp., and reddish-hued corals that provide crucial information about how life organizes itself in the deep. These organisms are not merely curiosities. They are indicators of ecosystem function in environments we are only beginning to understand.

The expedition was coordinated by Martín Brogger and Valeria Teso, researchers from Conicet, Argentina's national scientific council. Their work received support from The Nippon Foundation-Nekton Ocean Census and the Schmidt Ocean Institute, organizations committed to mapping the ocean's remaining unknowns. The workshop itself represented a significant collaborative effort—bringing together expertise from across continents to process and classify what a single research vessel had gathered from the seafloor.

What emerges from this work is a portrait of extreme biodiversity in extreme conditions. The Mar del Plata canyon, like many submarine canyons, acts as a funnel for organic material sinking from shallower waters above. This creates oases of food and life in an otherwise sparse environment. The creatures that inhabit these spaces have evolved in isolation for millions of years, which is why so many of them are entirely new to science. Each discovery is a reminder that the ocean remains largely unexplored—that vast regions of our planet harbor life we have yet to name or understand. The fifty-seven species confirmed in this workshop represent not an ending, but an opening: evidence that the deep Argentine waters hold far more secrets than we have yet uncovered.