盲虾 máng xiā

盲虾是最稀有的洞穴水生物，对生存环境要求很高，大多生活在水质纯净无污染且食物非常稀少的洞穴最底层，如果地下河水与地表水连通并受到污染就会立即死亡，因此数量非常稀少和珍贵。

百度翻译提供：

Blind shrimp is the rarest cave aquatic organism, which has high requirements for the living environment. Most of them live at the bottom of the cave where the water quality is pure and pollution-free and the food is very scarce. If the underground river is connected with the surface water and polluted, they will die immediately. Therefore, the number is very rare and precious.