is one piece episode 640 filler?

Upon arriving at Green Bit, the group can not find any traces of the people who captured the fish and notice both the large number of wrecked ships and the giant, lush forest of Green Bit. Law then obverses that the southeast beach is just up ahead while Usopp notices a Marine ship that had crashed into the island and Robin uses her binoculars to confirm that the ship had damaged the plants and trees just recently.