This study analyzed ten fish species (three farmed and seven wild-caught) to determine their centesimal composition (assessed by AOAC methods) and lipid profile (analyzed by GC-MS). Notably, "tambatinga" (farmed) and "piraputanga" (wild-caught) stood out with 28.66 % and 26.44 % protein content and 2.32 % and 3.71 % lipid content, respectively. Across all species, oleic acid was the predominant fatty acid, followed by linoleic acid. The sum of PUFAs ranged from 17.84 % in "matrinchã" to 7.85 % in "piraputanga". SFA varied from 49.93 % in "tambacu" to 39.90 % in "matrinchã", while MUFAs ranged from 44.34 % in "palmito" to 38.39 % in "tambaqui". "Matrinchã" had the highest average ω6 acid content (16.83 %), while "cachara" had the highest average for ω3 acids (5.73 %). "Piraputanga". "cachara", and "pincachara" exhibited the lowest ω6 levels. The analysis shows that fish have excellent nutritional values (proximate compositions) with few differences between species. "Pacu", "matrinchã", and "cachara" (wild-caught) demonstrated positive attributes, while "pincachara" (farmed) exhibited the highest nutritional quality in terms of fatty acid fraction. Based on quality indices (H/H), "pacu", "matrinchã" and "pincachara" are recommended choices for a healthy diet. This study adds valuable insights into the nutritional composition of fish species, which is essential for promoting regional development and local aquaculture.
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