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A new artificial fish swarm algorithm (AFSA) for solving the multiple knapsack problem (MKP) is introduced in this paper. In the proposed AFSA, artificial fish (AF) individuals are only allowed to search the region near constraint boundaries of the problem to be solved. For this purpose, several behaviors to be performed by AF individuals, including escaping behavior, randomly moving behavior, preying behavior and following behavior, were specially designed. Exhaustive experiments were implemented in order to investigate the proposed AFSA’s performance. The results demonstrated the proposed AFSA has the ability of finding highquality solutions with very fast speed, as compared with some other versions of AFSA based on different constraint-handling methods. This study is also meaningful for solving other constrained problems. key words: artificial fish swarm algorithm, multiple knapsack problem, constraint boundary, search region

A New Artificial Fish Swarm Algorithm for the Multiple Knapsack Problem