They were looking for a specific group of fish known as stone loaches. During the surveys, researchers found a dozen blotchy fish and, after taking a closer look, realized they’d discovered a ...

Yunnanilus triangulus, or the “triangle Yunnan loach,” was found in a “deep pool” in Huaning County in the Yunnan Province and earned its name from the unique triangular spikes made of ...

Researchers said a “rapid decline” of plant life and the introduction of a new species may have led to the loach’s disappearance. Photo by Liu, Lyu, Du, Chen (2025) In a deep pond rich with ...