Ocean Turtle (オーシャン・タートル, Ōshan Tātoru?) is the fifth episode of the Sword Art Online Alicization anime adaptation. It aired on November 3, 2018.
- Adapted from Volume 10, Chapter 2, Part 1-2
- Laughing Coffin raid flashbacks were anime original scenes.
- The entire scene of Kazuto being loaded in an ambulance and his heart stopping was omitted.
- In the Light Novel, Asuna did not notify Suguha and Midori until after Kazuto's operation was over.
- Therefore, the scene of Asuna, Suguha and Midori at the hospital was anime original content.
- The scene of Seijirou convincing Midori to place Kazuto under his jurisdiction and supposedly transfer him to a military hospital was anime original content.
- In the Light Novel, Lisbeth and Silica were not present at Asuna's, Leafa's and Sinon's meeting in ALfheim Online.
- In the Light Novel, Asuna, Leafa and Sinon quickly deduced Kirito was at the Ocean Turtle from information previously given to them by him at the Dicey Cafe and news reports on the facility.
- Therefore, the scenes where Asuna, Suguha and Ryoutarou search the harbor while Shino, Rika and Keiko check Rath's facility in Tokyo was anime original content.
- In the Light Novel, Yui also explained the concept of «Top-Down AI» and «Bottom-Up AI» at Asuna, Leafa and Sinon's meeting, using herself as an example of «Top-Down AI».
- The scene of Rinko's and Kayaba's past relationship was anime original content.
- The scene of Rinko receiving Asuna's E-Mail was anime original content.
- One of YUNA's songs, longing, can be heard on the radio when Ryoutarou is driving Asuna and Suguha to the harbor.