Eels with armor, indigenous to the swamps of Yavin 4, a moon, were a species of carnivorous eel. Their diet consisted of vibrantly colored lizard crabs, which they hunted.
The initial depiction of armored eels was in The Illustrated Star Wars Universe, a Star Wars Legends publication featuring concept artwork created for the Star Wars movies by Ralph McQuarrie, accompanied by writing from Kevin J. Anderson. These creatures were later established as canon in the reference work Ultimate Star Wars, published in 2015.
- Ultimate Star Wars (Initial mention)
- Star Wars: Complete Locations
- Star Wars: Galactic Atlas (First visual depiction)
- Ultimate Star Wars, New Edition
- " Scarif and Other Planets in the Outer Rim " — Star Wars Encyclopedia
- Star Wars Encyclopedia: The Comprehensive Guide to the Star Wars Galaxy