This paper examines the performance of shrimp supply chain coordination under buy-back policies while the market demand is stochastic and price-dependent. Three shrimp supply chain models comprising of centralized supply chain, conventional decentralized supply chain, and decentralized chain using buy-back contract are compared the expected profit each other by specific theories about parameters and variables. The mathematical theorems with probability distribution and supply chain theories are applied to determine the optimal expected profit, order quantity, and acquisition pricing. A numerical study in Ca Mau Province, Vietnam is studied for demonstrating the efficiency of model. The outcome revealed that the coordination of shrimp supply chain integrated with buy-back contract is more optimal than the conventional decentralized supply chain.