Abstract
Facial sexual dimorphism of Terapon theraps Cuvier, 1829 was studied through geometric morphometric method. Twenty-four landmark based morphometric distances, acquired from lateral side of head, were subjected to canonical discriminant analysis (CDA) to understand facial sexual dimorphism in the species. Scatter plot of canonical factors differentiated male and female based on measurements associated with jaws, opercle and pectoral fin. Discriminant function analysis (DFA) described sexes with 28.76% error. The study showed that geometric morphometry based sexual differentiation in fishes with no external characters is a promising tool. Keywords: Geometric morphometry, Sexual dimorphism, Terapon theraps
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