is one piece episode 261 filler?

On the Sea Train tracks, T Bone is seen running and is ashamed of himself for falling for a trap. T Bone is trying to catch up to the Puffing Tom not wanting to let down his men.

Not too far behind, everyone is still shocked to see the sliced Sea King and Zoro readies himself for a fight. T Bone eventually stops running after seeing another Sea Train.

Zambai gets a closer look on the person and he reveals him to be "Ship-Slasher" T Bone. Luffy wonders who that is and Zambai explains that T Bone is from the Navy and that he can slash through any ship.