Abstract
Myloplus tiete (Characiformes, Serrasalmidae) is a native fish species found in the upper Paraná River basin, popularly known as "silver pacu." It is medium-sized, reaching up to 32.5 cm in length, and exhibits herbivorous feeding habits. According to the "Red Book of Threatened Brazilian Fauna," it is classified as "Endangered" and is listed as a target species of the National Action Pla…