57 new species discovered in deep-sea canyon near Argentina

A mischievous sea cucumber and 56 other newly discovered marine species are making a splash in the South Atlantic Ocean. The new creatures were discovered during an expedition of the Mar del Plata Submarine Canyon off the coast of Argentina in August 2025. This expedition focused on the Brazil–Malvinas Confluence, a region where warm subtropical currents collide with cold, nutrient-rich sub-Antarctic waters. The result is an oceanographic crossroad bustling with biodiversity. The submarine