Deep-sea scientists discover 57 new species in a canyon nearly twice as deep as the Grand Canyon
Scientists from the Ocean Census Network have discovered 57 new marine species and five previously unknown genera during research focused on Argentina’s Mar del Plata Canyon in the South Atlantic. The discoveries include 20 new species of copepods, 22 echinoderms (including sea cucumbers and crinoids), 14 cnidarians (corals and sea pens), and one scaphopod mollusk. Among the most unusual finds is a sea cucumber nicknamed “Loki” because its horn-like appendages resemble the Norse god. These discoveries highlight the incredible biodiversity hidden in the deep ocean.
The discoveries stem from the Schmidt Ocean Institute’s 2025 Underwater Oases of the Mar del Plata Canyon expedition, which explored depths exceeding 3,500 meters aboard the research vessel Falkor (too). Using the remotely operated vehicle SuBastian, scientists documented deep-sea coral reefs and other remarkable marine life, sharing live footage that attracted more than four million viewers worldwide. In July 2026, an international workshop brought together 20 taxonomists and early-career researchers to examine specimens, identify new species, and strengthen scientific collaboration using advanced identification techniques and the open-access Ocean Census NOVA platform.
Beyond the remarkable number of discoveries, the project represents an important step forward for marine biodiversity research and scientific collaboration in Argentina and throughout Latin America. Specimens will be preserved in national scientific collections, supporting future research and education. Scientists emphasize that much of the deep ocean remains unexplored, and these findings demonstrate how international partnerships can accelerate our understanding of marine life. Another expedition is planned for February and March 2027 to investigate a different submarine canyon and uncover even more of the ocean's hidden biodiversity. To learn more read Magda Patymska’s article Deep-sea scientists discover 57 new species in a canyon nearly twice as deep as the Grand Canyon | Discover Wildlife