An international team of researchers has identified 31 previously unknown species of marine organisms off the coast of Brazil. Among the discoveries were transparent squid, comb jellies, siphonophores, deep-sea fish, and a fast-moving worm from the genus Tomopteris. The findings of the expedition were reported by Popular Science on July 4.
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The research mission lasted two weeks in the southern Atlantic Ocean. The scientists’ primary focus was the so-called midwater zone—the region between the ocean’s surface and the seafloor, located at depths of roughly 180 to 1,000 meters. Despite the immense size of this area, it remains one of the least studied ecosystems on the planet.
Expedition leader Karen Osborn noted that the midwater zone is the largest habitat on Earth. According to her, it is home to a multitude of organisms whose characteristics science is only beginning to explore. Researchers emphasize that deep-sea inhabitants display a wide range of survival mechanisms under conditions of high pressure, perpetual darkness, and limited access to conventional energy sources.
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One of the most unusual finds was a new species of siphonophore. Based on preliminary assessments, scientists believe it may belong not only to a previously unknown genus but also to a new family. Additionally, experts discovered transparent cephalopods, comb jellies, and fish larvae whose adult forms have yet to be identified.
The study’s authors believe that these findings expand our understanding of biodiversity in the deep-sea ecosystems of the Atlantic. Examining the discovered organisms will help clarify the structure of one of Earth’s least explored natural environments and shed light on the specifics of life at great depths.
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