An international research team discovered 31 previously undescribed marine species during a two-week expedition in international waters off the coast of Brazil [1, 2].
The discovery highlights the vast, undocumented biodiversity of the ocean's mid-water habitat. Because this region is difficult to access, much of its biological makeup remains unknown despite its critical role in the global ecosystem.
Operating from the Schmidt Ocean Institute vessel Falkor, the team explored the ocean's "twilight zone," which consists of depths between 200 and 1,000 meters [7]. To identify the creatures, researchers utilized robotic imaging vehicles and a specialized laser-based microscope known as the Squid [2, 7].
This breakthrough laser-scanning technology allows scientists to document fragile organisms in their natural environment without the damage often caused by traditional sampling methods. The team focused on this specific depth range to map biodiversity before habitat loss, and other environmental threats further jeopardize the region [7].
The twilight zone is estimated to house 90% of the global biosphere [7]. Despite its scale, the area has historically been under-researched due to the technical challenges of imaging and capturing specimens at such depths.
By combining robotic exploration with high-resolution laser imaging, the expedition was able to identify 31 species that had never been described by science before [3, 4]. The researchers said the mission was designed to unveil the mysteries of the South Atlantic's deep waters.
“31 previously undescribed marine species”
The discovery of 31 new species in just two weeks underscores how little is known about the mid-water column. By utilizing non-invasive laser technology, researchers can now catalog biodiversity more rapidly and accurately. This data is critical for establishing conservation baselines as deep-sea mining and climate change begin to impact habitats that were previously considered unreachable.
