is one piece episode 443 filler?

Luffy, Ivankov and Inazuma encounter an old enemy of Luffy -- Crocodile. Crocodile wants to join them, saying he can create an escape passage in the ceiling with his devil fruit powers.

Luffy immediately declines when he remembers who Crocodile is and what he did to Vivi. Crocodile says he has no more interest in the country of Alabasta.

Ivankov accepts his offer, telling all of them that he knows a weakness of Crocodile. Then, from behind, Jinbe asks Luffy if he could join too, willing to sacrifice himself to rescue Ace.

Inazuma opens up their handcuffs with his powers, and the two are out.