A new species of microscopic worm, *Diplolaimelloides woaabi*, was identified in late 2025 in what highly saline North American lake?

A remarkable scientific discovery in late 2025 brought to light a previously unknown inhabitant of a highly saline North American lake: a new species of microscopic worm, *Diplolaimelloides woaabi*. This fascinating creature was identified in Utah's Great Salt Lake, a vast and unique ecosystem known for its extreme conditions. The discovery adds a new dimension to our understanding of life in hypersaline environments, as this nematode is believed to be endemic to the lake, meaning it exists nowhere else on Earth.

The Great (Review) Salt Lake stands as the largest saltwater (Deals) lake in the Western Hemisphere, presenting a challenging habitat due to its high salinity, which can be several times saltier than the ocean. Prior to this finding, only a select few multicellular animals, primarily brine shrimp and brine flies, were known to thrive in these harsh waters. The *Diplolaimelloides woaabi* worm, typically less than 1.5 millimeters long, was found living within microbialites, which are reef-like structures formed by communities of microbes on the lakebed. Its ability to adapt to such extreme conditions makes it a significant subject of study.

The naming of this new species also carries cultural significance. Researchers collaborated with the Northwestern Band of the Shoshone Nation, whose ancestral lands encompass the Great Salt Lake, and chose "woaabi," an Indigenous word for "worm," to honor their heritage. Scientists are still working to fully understand the ecological role this worm plays in the lake's intricate food web. However, its presence suggests it could serve as a valuable bioindicator, offering insights into the environmental health and changes occurring within this critical North American natural wonder. The origins of *Diplolaimelloides woaabi* are also a subject of ongoing research, with theories suggesting it could be a relic from an ancient marine past or even introduced by migratory birds.