Learn English – Why does “under the sea” mean “in the sea”

prepositionsword-choice

Why is it OK to refer to things in the sea as being "under the sea"? Wouldn't that really be the sea floor and below?

Best Answer

"Under the sea" is short for "under the surface of the sea"; the phrase is meant to evoke the romantic image seeing the waves passing while standing on the deck of a ship, say.