ABSTRACT We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin. a blackwater river in the Brazilian Amazon. Geometric morphometrics was used to evaluate variation in body shape among populations from four tributaries (UN2-UN5). We found no evidence for sexual dimorphism in body size and shape. https://parisnaturalfoodes.shop/product-category/thyroid-support/