A Crustacean was a class of animal life with hard heavy shells. One known crustacean creature was the Sleeper, which dwelled on the planet Dathomir. During the Clone Wars, Quinlan Vos killed the Sleeper while under the tutelage of former Sith assassin Asajj Ventress.
- The Vow of Silver Dawn (Mentioned only)
- Dark Disciple (First appearance, simultaneous with Dark Disciple audiobook)
- Dark Disciple audiobook
- Star Wars Jedi: Fallen Order
- Last Shot
- Last Shot audiobook
- "The Wine in Dreams"—Canto Bight (Mentioned only)
- Star Wars Resistance – "Bibo"
- Star Wars Resistance – "The Escape"
- Star Wars: The Last Jedi: Expanded Edition (Mentioned only)
- Star Wars: The Last Jedi: Expanded Edition audiobook (Mentioned only)
- "Vengeful Waves"—Myths & Fables (Mentioned only) (In flashback(s))
- "Tales from Wild Space: The Best Pet"—Star Wars Adventures (2017) 5 (Mentioned only)
- Star Wars Helmet Collection 1 (Databank A-Z: Ask Aak–Stass Allie)
- Star Wars: The Last Jedi: Incredible Cross-Sections (Appears in hologram)
- Star Wars Helmet Collection 42 (Databank A-Z: OOM-9–Viceroy Bail Organa)
- Star Wars: The Complete Visual Dictionary, New Edition
- Star Wars: The Galactic Explorer's Guide
- "Scarif and Other Outer Rim Planets" – Star Wars Encyclopedia