is one piece episode 485 filler?

Blackbeard emerges among the ruins of Marineford, accompanied by his crew and several Level 6 escapees from Impel Down. He begins to fight Whitebeard, who confronts him for his betrayal of the Whitebeard Pirates by murdering Thatch, and his hand in the death of Ace.

Whitebeard and Blackbeard clash several times, until Whitebeard then lands a critical blow to Blackbeard and then continues to pin him down and tries to crush his throat.