One Pace — Marineford 16

One Pace Marineford episode 16 ("A Gift to a New Era") covers manga chapters 577–578.

A Gift to a New Era

One Pace

Marineford 16A Gift to a New Era

Manga chapters

Chapter 577
Chapter 578

Source anime episodes

Episode 486
Episode 487

What One Pace is

One Pace is a fan project that re-edits the Toei anime to match the manga's pacing. It cuts filler, recaps, and stretched scenes, so a single One Pace episode usually covers the same ground as several broadcast episodes — here, chapters 577–578 re-cut from anime episodes 486–487.