This paper analyses a new theme that raises specific legal-criminal issues. The author, a passionate connoisseur of inland and border waters of Romania aimed at investigating the subject from the point of view of a criminal law specialist, suggesting possible improvements of criminal legislation in the matter, especially in light of EU regulations. There are also presented data on the types of activities carried out inland and border waters (from shipping goods and people to sport fishing), on the principle of territoriality of criminal law and its scope (including the contiguous zone and exclusive economic zone, on the various types of offenses which are committed in border waters with Moldova, Bulgaria, Ukraine, Serbia, Hungary or at maritime border, on border areas disputed between Romania and Ukraine, Snake Island and Channel Bystroe); all these aspects accompanied by documented explanations reveal the author's passion for research.