Stock profile Portunus pelagicus (Linnaeus 1758) belongs to the order Decapoda referring to ten appendages, infraorder Brachyura or true crabs, and family Portunidae or swimming crabs. Their carapace varies from being transversely ovate to transversely hexagonal and sometimes circular, with the male P. pelagicus having distinctively blue markings and a triangular abdomen while the female has a dull green color and semicircular abdomen. Called the blue swimming crab, flower crab, manna crab, or sand crab, P. pelagicus is known in the dialects as kasag, alimasag, lambay, or masag.They are widely distributed in shelf areas particularly along the nearshore at depths not exceeding 70 m (Ingles 1996) and mainly in traditionally demersal fishing grounds

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