An inducible offense is a plastic change in a predator in response to the presence of certain prey that enables the predator to capture that prey more efficiently. Although past studies have paid considerable attention to the adaptive significance of inducible offenses, they have rarely focused on their ecological impacts. To understand how inducible offenses modify predator-prey interactions and what resultant consequences are provided, we conducted an enclosure experiment in an artificial pond. We placed 250 frog tadpoles (Rana pirica) and 5 salamander larvae (Hynobius retardatus) with non-offensive or offensive phenotype (i.e., enlarged gape induced under high density of tadpoles) into 16 enclosures. The tadpoles decreased in Offensive treatment more than Non-offensive one. Metamorphosis timing of offensive salamanders was earlier than that of non-offensive predators. Since metamorphosis of salamanders allowed aquatic insects to colonize into the enclosures, abundance and taxonomic number of aquatic insects at the end of experiment were larger in Offensive treatment than Non-offensive treatment. In conclusion, salamander inducible offenses can provide wide impacts on pond community.