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Abstract
Surveys of hillstream fishes at Wangtakrai Park, Nakhon Nayok Province, central Thailand, were conducted from November 2022 to July 2024 to assessspecies number and composition. The checklist of fish diversity was created based on 756 specimens collected during this period representing 22 species across 14 families and 6 orders. The species composition showed that the most dominant family was Cyprinidae with five species (22.7%) followed by thefamilies Danionidae, Bagridae, Mastacembelidae and Channidae,each with twospecies (9.1%). Themostabundant species by individual count was Poropuntius deauratus (43.4%) followed byChanna limbata(18.7%) and Xenentodon canciloides (9.1%). Notably, Glyptothorax coracinus was recorded for the first time in the Bang Pakong Basin. The results suggested that Wangtakrai Park can sustainably maintain the equilibrium of its forest-stream habitat, likely serving as a biogeographical overlap zone for ichthyofauna from the Chao Phraya River and Phanom Krawan Range.
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