The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins Author Chan, Jeffery C. F. Author Tsang, Alphonse H. F. Author Yau, Sze-man Author Hui, Tommy C. H. Author Lau, Anthony Author Tan, Heok Hui Author Low, Bi Wei Author Dudgeon, David Author Liew, Jia Huan text Raffles Bulletin of Zoology 2023 2023-02-22 71 128 168 journal article 10.26107/RBZ-2023-0012 2345-7600 7815765 82C3DAD3-0920-4430-A93D-9F887A58DC1A Poecilia sphenops (Valenciennes) ( Fig. 47 .) Fig. 47. Poecilia sphenops (melanistic variety), Lam Tsuen River, note damaged dorsal fin, photographed by Chun Hin Wan. Distribution. Lam Tsuen River ( Chan, 2001 ; C.H. Wan, pers. comm., 2021). Native range. Central and South America. Remarks. Has only been recorded twice, twenty years apart. It is scarce in the wild despite its prevalence in the local aquarium trade, suggesting that it has difficulty establishing itself.