One Pace — Fishman Island 19

One Pace Fishman Island episode 19 ("What Are You?") covers manga chapters 640–641.

What Are You?

One Pace

Fishman Island 19What Are You?

Manga chapters

Chapter 640
Chapter 641

Source anime episodes

Episode 561
Episode 562

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 640–641 re-cut from anime episodes 561–562.