Bottlenose dolphins (Tursiops truncatus) frequently interact with fisheries worldwide, yet their fine-scale behavioral responses to fishing fleets remain poorly documented in tropical continental shelf ecosystems. We described and quantified the behavioral repertoire of T. truncatus during interactions with artisanal and industrial fishing vessels on the Amazon Continental Shelf, northern Brazil. Behavioral observations were conducted from fishing vessels used as opportunistic platforms between 2017 and 2020, totaling 1,836 h of effort over 153 days at sea. We constructed a detailed ethogram from video analyses and classified 19 behavioral events into three categories: aerial behaviors, locomotion/swimming, and feeding. For each survey day, we recorded the absolute frequency of each behavior and applied non-parametric tests to evaluate differences among categories and events. Locomotion/swimming behaviors were the most frequent overall, followed by aerial displays and feeding events associated with fishing operations. Dolphins commonly approached vessels, surfed bow waves, and performed synchronized aerial behaviors, while feeding occurred both near active gear and in association with discards. Our results indicate that dolphins adjust their activity budget and spatial positioning to exploit predictable food resources generated by fishing fleets, while maintaining high levels of movement and social coordination. This flexible behavioral repertoire likely reflects a trade-off between energetic benefits from opportunistic feeding and potential risks associated with fishing interactions. The study highlights the Amazon Continental Shelf as an important area of human–dolphin interaction and provides a baseline for assessing how changes in fishing effort or management may affect the behavioral ecology of T. truncatus in this region.