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**//Potamon anacoluthon//** **Scientific name:** Potamon anacoluthon [([[http://decapoda.nhm.org/pdfs/27130/27130.pdf|Ng, Peter K.L., and David Dudgeon. "The Potamidae and Parathelphusidae (Crustacea: Decapoda: Brachyura) of Hong Kong." Invertebrate Taxonomy 6 (1992): 741-68.]], Ng & Dudgeon)] **Endemic?:** Yes[(#1)](**Year of Discovery**: 1918, **Discoverer**: Kemp)[(#1)]\\ **Range:** It has been observed in a stream in Tai Po Kau Forest Reserve, New Territories, in a stream at Wu Kwai Sha, New Territories, and in a fish trap, Kwun Yum Shan stream, New Territories[(#1)]. \\ **Physical Description** \\ {{:wiki:screen_shot_2014-02-18_at_1.34.34_pm.png?400|}}[(#1)] Photos\\ **Physical Description** \\ \\ **Habitat** \\ This species appears to be most numerous in shaded shallow streams with clear, fast-flowing water, rocky substratum, and accumulations of leaf-litter, which serve as shelter and food[(#1)]. The water it lives often appears tea-coloured, with a pH of 6.5-7.0[(#1)]. It is never found in polluted waters and seems to be relatively stenotopic[(#1)]. Two collected specimens were obtained from '... under large stones at the edge of a small stream at an altitude of 2000 ft' (Kemp, 1918).