One Piece · S06E149
Steer for the Clouds! Capture the South Bird!
2003-03-23 · 24 min · 3.2 (9) · TMDB
Cricket explains how the Straw Hats can ride a dangerous vertical current called the Knock-Up Stream to get to Skypeia. However, they first have to catch a southbird to point them toward the point where the stream will erupt from the ocean.