The Ascalin was an Andalite assault ship that was featured in Book #18: The Decision. It was the main ship used in the book where it pulled the Animorphs into Z-space while it was on its way to the Leeran homeworld, Leera. It was destroyed when its captain, Samilin-Corrath-Gahar was revealed to be working with the Yeerks, and he wasn't even a Controller. Nothing is specified about the size role or appearance of this class of ship although it seems to not be as large as a dome ship.
|Dome ships||StarSword | GalaxyTree | TailStrike | Elfangor|
|Andalite fighter||Elfangor's fighter|
|Unknown class||The Jahar | Ascalin|