Chalceus epakros is a South American freshwater characiform fish of the family Chalceidae, distributed across the Amazon basin, Orinoco drainage, and Essequibo River system, where it inhabits tropical river environments with open swimming space. The species is recognized by its slender metallic body, pointed snout, faint lateral markings, and reddish to pink caudal fin, giving it a refined yet active appearance among pink-tail chalceus relatives. Understanding Chalceus epakros highlights the diversity of northern South American freshwater fishes, the subtle differences used to distinguish closely related Chalceus species, and the importance of spacious, stable aquatic habitats for maintaining their natural behavior and visual appeal.
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