How "water" can be plural here?

Native speaker’s answer
Rebecca
Generally, we do not use the plural form for "water." However, there are two exceptions to this rule. When we are referring to the particular water of a sea, lake, or lake, we might use "waters" to refer to this body of water. Because the speaker is referring to the water of the U.S. South Atlantic Coast and the Gulf of Mexico, "waters" has been used here. Ex: The waters of Lake Ontario are deep. Ex: The Hudson River no longer has many fish species living in its waters. The other case is when we are referring to an area of water that falls under the authority or jurisdiction of a government or country. This term is usually referred to in the political sense. Ex: The boat illegally entered Russian waters. Ex: The country's coastal waters are constantly patrolled by the Navy.