/ˈkoʊstəl ˈwɔtərz/ – Phrase
Definition: mặt nước ven bờ, thủy phận ven bờ.
A more thorough explanation: Coastal waters refer to the marine waters adjacent to the coast, typically extending from the shoreline to a certain distance offshore as defined by law or regulation.
Example: The company was fined for illegally dumping waste in the coastal waters, in violation of environmental regulations.