The Cobalian Octomoth was a monster that was taken by Commander Spog to the Aldaros Plains to confront the heroes.
A hidden bronze trophy is rewarded when you defeat the Octomoth.
The Cobalian Octomoth was a large squid-like creature with predominately purple skin. It had eight arms, six green eyes and a scorpion-like tail.
- Ratchet & Clank: All 4 One (first appearance)