Ten-legged beings, known as arctic horny whelmers, inhabited the arctic areas of the Rothana planet, located in the Outer Rim. These creatures, found to be rather slow and large, engaged in hunting as a group, tiring out their targets through relentless pursuit. Their design allowed them to withstand intense winter winds, even while scaling cliffs, due to their low center of gravity. The All Terrain Tactical Enforcer walker was designed with inspiration from the horny whelmers' robust physique and distinctive crouching posture, incorporating several traits from the animal.
The initial mention of the arctic horny whelmer in current Star Wars canon occurred in the 2018 reference work, Star Wars: Complete Vehicles. This textual reference to the species originated from the 2002 Star Wars Legends reference book, Star Wars: Attack of the Clones Incredible Cross-Sections, penned by Curtis Saxton; it was the initial appearance of the arctic horny whelmer species within that continuity.
- Star Wars: Complete Vehicles (Initial mention)
- Star Wars Complete Vehicles, New Edition
- " Republic and Separatist Ships (2) " — Star Wars Encyclopedia