The Young Man and the Sea

is episode 223 of the Naruto: Shippūden anime.

Summary
Tsunade sends out Naruto under the guise of a top-secret mission to keep him hidden away from the Akatsuki. Unfortunately, Naruto, Yamato, Guy, and Aoba are stuck at the pier due to a report of a monster attacking ships.

Trivia

 * The episode's name and story are probably based off Ernest Hemingway's novel, The Old Man and the Sea.