China’s first freshwater cave snail in a dark mountain cave

Representative Image of a rare freshwater cave snail with a translucent shell in a dark cave environment (AI-generated image) Scientists have identified China's first known freshwater cave snail, a species so rare that only three living adults have ever been found. The tiny animal has no eyes, almost no colour in its body, and a translucent shell thin enough to reveal the delicate tissue underneath. Researchers discovered it deep inside a mountain cave in southwestern China, where sunlight never reaches, and life has adapted accordingly. The newly identified species, named Erhaia dijiang, was found in Hongta District of Yuxi City in Yunnan Province. Its discovery fills a notable gap in the study of East Asia's underground freshwater ecosystems, which remain far less explored than habitats above ground, and raises fresh questions about how such a fragile species has managed to survive at all.Why this newly found snail has no eyes or colourErhaia dijiang belongs to a group of animals called troglobionts, meaning it is built entirely for life inside caves and cannot survive elsewhere. Over countless generations in permanent darkness, the species lost its eyes and the related structure...