This research applied a multi-method approach, combining new empirical data with satellite information on fishing activities and vessel characteristics to map risks of labor abuse and IUU fishing, understand their relationships, and identify major drivers. Through the survey, experts assessed 792 ports and identified that more than 41% of these ports were associated with labor abuse and 48% with IUU fishing. Port risk scores for labor abuse and IUU fishing were highly correlated, suggesting that both problems are widespread and linked through activities at port.