The purpose of this study was to identify whether it is possible to grow green mussel in the State of Sarawak Malaysia based on the evaluation of available biophysical parameters, economic and market opportunities. Site suitability rating systems are developed to access the environmental parameters of the sites. The biophysical parameters such as salinity, temperature, dissolved oxygen, pH, turbidity, water current and depth of the site were collected from secondary data, rated and finally categorised. The profitability model of raft and long line culture methods was considered in this study based on assumptions and data collection by reviewing printed and electronic articles from research publications. Investment indicators net present value (NPV), internal rate of return (IRR), and sensitivity analysis on sale price, cost of seeds and harvest weight are determined.