<p class=\"MsoNormal\" style=\"margin-bottom: .0001pt; text-align: justify;\"><em><span style=\"font-size: 8.0pt; line-height: 115%; font-family: \'Times New Roman\',\'serif\';\" lang=\"EN-PH\">This study was conducted to identify the intra-specific variations and the possible sexual dimorphism of Leiopotherapon plumbeus (Kner, 1864), locally known as &ldquo;Ayungin&rdquo;, an endemic fish species in the Philippines and naturally occurring in freshwaters. &ldquo;Ayungin&rdquo; or silver perch is a commercially important species as it is used mainly for subsistence fisheries. A total of 159 specimens were gathered from Lake Sebu, South Cotabato. Thirty males and thirty females were subjected to analysis using Geometric Morphometrics. The Cartesian coordinates of 16 landmarks were digitized from scanned images of the fishes. Relative Warp Analysis (Rohlf </span></em><span style=\"font-size: 8.0pt; line-height: 115%; font-family: \'Times New Roman\',\'serif\'; mso-bidi-font-family: \'Times New Roman\'; mso-bidi-theme-font: minor-bidi;\" lang=\"EN-PH\">2008<em>)</em></span><em><span style=\"font-size: 8.0pt; line-height: 115%; font-family: \'Times New Roman\',\'serif\';\" lang=\"EN-PH\"> was used to determine the variations of the body shapes of both male and female Leiopotherapon plumbeus (Kner, 1864). Results of relative warps show prominent variations in the head and caudal region. Also, female samples varied in their body depth. Statistical results were generated using Discriminant Function Analysis (DFA) and Kruskal-Wallis Test of PAST software (Hammer et al., 2009). The results of both DFA and Kruskal-Wallis Test showed no significant difference between the body structures of male and female samples of Leiopotherapon plumbeus (Kner, 1864). Therefore, the population of Leiopotherapon plumbeus (Kner, 1864) in Lake Sebu do not exhibit sexual dimorphism hence both sexes evolved the same manner. In addition, intra-specific morphological variations are observed in Leiopotherapon plumbeus (Kner, 1864) and these could be caused by the present habitat stress conditions of Lake Sebu such as continuous degradation of water quality, seasonally occurring &ldquo;Kamahong&rdquo; or fish kills and pollution.</span></em></p>