Abstract: In this study, the width/length-weight relationships of the blue crab population (Callinectes sapidus Rathbun, 1986) living in Camlik Lagoon Lake (Adana) were investigated considering sex and maturity. A total of 743 samples were collected and analyzed. The Carapace Width (CW) distribution ranged from 2.30 to 17.80 cm and the weight distribution ranged from 0.70 to 301 g. Carapace width/carapace length-weight relationships was found to be as W = 0.4782CL3.106 (R = 0.987) and W = 0.0902CW2.932 (R = 0.982).