is one piece episode 53 filler?

After, escaping death by luck, Luffy, Zoro, and Sanji head for the Going Merry, but Buggy and Alvida are in pursuit. Before the duo can take off they are captured by the Marines, but the duo later escape.

On the way Tashigi appears and challenges Zoro to a duel for lying to her, Zoro points out that he didn't lie, he just didn't tell her. Nevertheless, Zoro and Tashigi clash swords.

Meanwhile, Nami and Usopp reach the Going Merry as Mohji was about to burn it down. Before Mohji can properly fight Nami, the Marines catch up and shoot at Mohji.