Abstract An important aspect of the size-structured stock is assumption that individuals progress from one size class to another after a certain time. In this study, total 2581 monthly samples swimming crab Callinectes amnicola were collected landings artisanal fishery in Cross River, Nigeria over period 13 months, January 2021 2022. Crabs ranged length 6.5 cm 15.5 cm, with most crabs caught du...