is one piece episode 311 filler?

The Straw Hat Pirates, Franky, Kokoro, Chimney, and Gonbe leap into the sea to find the Going Merry waiting for them. It takes a moment for the Marines of the Buster Call to realize what's happening.

As the rope ladder seemingly drops on its own, Sanji and Nami climb aboard. As Zoro carries Chimney and Gonbe up with him, Franky brings Usopp, and Kokoro tosses Luffy, Robin, and Chopper aboard before climbing on, Sanji starts wondering how the Merry got here and who threw down the rope ladder.

Many of the Straw Hats are choking back emotion at being back aboard their ship.