is one piece episode 26 filler?

Gin holds Zeff at gunpoint, threatening to shoot. Pearl recovers from Sanji's attacks and prepares a counterattack, stating that Gin would shoot if Sanji were to dodge his attacks.

With this, Sanji has no choice but to take his attacks, as he is struck in the head by his shields. While he is down, Sanji reflects on his childhood with Zeff.

As a child, Sanji was working as a cook aboard a cruise ship, which was then attacked by Zeff's crew, the Cook Pirates. The Cook Pirates plundered the ship and beat Sanji, where Sanji states his dream of locating the legendary All Blue.