with uniform development compared to crabs injected with 17α-OHP. In addition, decreased 17α-OHPL concentrations in the crab's haemolymph signifies utilization (of this hormone) to produce oestrogen. Hence, the findings obtained from this study depict fundamental biological information of the crab, S. olivacea. Nevertheless, the use of matured female S. olivacea is highly recommended for better results.