<p><em style=\"mso-bidi-font-style: normal;\"><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 9pt;\" lang=\"EN-US\">Oreochromis niloticus</span></em><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 9pt;\" lang=\"EN-US\"> (Linneaus 1758) is an invasive species known to be threatened and attaining taxonomic confusion in environmental changes in Lake Sebu ecosystem. Hence, a need to study the morphological variations of this species using the advance methods develop in studying images of biological structures such as Landmark-based Geometric morphometrics. </span><span style=\"color: black; font-family: \'Times New Roman\',\'serif\'; font-size: 9pt; mso-fareast-font-family: \'Times New Roman\';\" lang=\"EN-US\">The researchers gathered 60 specimens in study area. Sixteen landmark points were assigned on the specimen from digitized images of 60 fishes. A total of 120 images were examined. Relative warp end result is that there were extreme variations</span><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 9pt;\" lang=\"EN-US\"> in body shape of the specimen</span><span style=\"color: black; font-family: \'Times New Roman\',\'serif\'; font-size: 9pt; mso-fareast-font-family: \'Times New Roman\';\" lang=\"EN-US\">. Multivariate Normal Test further revealed that the significance of variation in its morphology is very significant. The morphological variations observed in a relative warps could be caused by the present environmental condition of Lake Sebu wherein water quality is polluted. </span><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 9pt;\" lang=\"EN-US\">Therefore, environment changes in Lake Sebu ecosystem do affect the body shape of <em style=\"mso-bidi-font-style: normal;\">Oreochromis niloticus</em>.</span></p>
<p><strong style=\"mso-bidi-font-weight: normal;\"><em><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 10pt; mso-bidi-font-size: 9.0pt;\" lang=\"EN-US\">Keywords</span></em></strong><span style=\"font-family: \'Times New Roman\',\'serif\'; font-size: 9pt;\" lang=\"EN-US\">&mdash;</span><span style=\"color: black; font-family: \'Times New Roman\',\'serif\'; font-size: 9pt; mso-fareast-font-family: \'Times New Roman\';\" lang=\"EN-US\">Geometric morphometrics, <span style=\"mso-spacerun: yes;\">&nbsp;</span>Multivariate Normal Test, <em style=\"mso-bidi-font-style: normal;\">Oreochromis niloticus,</em> Relative warp</span></p>
 