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Marine biofouling is a sticky problem.Development of environment-friendly anti-biofouling systems is a challenge.We have prepared biodegradable polymers for marine anti-biofouling,where the degradation leads to a self-renewal surface.We have examined the enzymatic and hydrolytic degradation of the polymers in seawater and the anti-biofouling by marine field tests.Our studies demonstrate that the degradation rate and mechanical properties can be controlled by the composition and structure of the polymers.The degradable polymers show good antifouling ability due to its self-renewing property.Moreover,the polymers can serve as a carrier and release system of organic antifoulant.Such systems are promising in marine anti-biofouling.