<p><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 10pt;\" lang=\"EN-US\">Assessing the variation in shape between sexes of a given species has always been an important mean in understanding their behavior, differences and all the other principles underlying between them. Due to the growing technological advances of science, studying variations on the shape between male and female has been made available. In this regard, the study of qualitative and quantitative morphological variation in relation to scale shape morphology has been used to study intra- and interspecific variations between established body regions of the male and female Trimac (<strong style=\"mso-bidi-font-weight: normal;\"><em style=\"mso-bidi-font-style: normal;\">Amphilophus trimaculatus</em></strong>) fish. Herein, variations among scale shape morphology of the two sexes of Trimac fish has been quantified and visualized using the geometric morphometric approach particularly the Relative Warp analysis (RWA) tool. Result showed great variation in scales between two sexes with female having wider scales compared to male in the left lateral to right lateral tip. Discriminant/Hotelling test also revealed their significance by having the value of (p&lt;0.05). Indeed, relative warp analysis is an efficient tool for the existence in variation of scale shape morphology of Trimac fish.</span></p>
 