You use el because the word mar is the subject of the title.
💡 When referencing the movie in Spanish, treat it as a masculine noun: " El filme Mar adentro" or simply " El Mar adentro." Mar adentro
A true story about Ramón Sampedro's 28-year campaign for the right to die with dignity. You use el because the word mar is the subject of the title
While the film's title is often used without an article as a proper noun, if you are referring to it in a sentence (e.g., "The movie Mar Adentro "), the correct article to use is: Mar adentro Quick Grammar Facts Gender: Mar (sea) is generally masculine in Spanish. "The movie Mar Adentro ")