When a nuclear explosion mutates multiple humanoid fish into Hangyolas, he roams Japan, destroying everything in his path. But, unbeknownst to him, the same explosion had also mutated a Kappa in to Death Kappa. The two faced each other in battle, but Death Kappa came out on top.
Hangyolas can expel a concentrated stream of fire from his mouth.
- Main article: Hangyolas/Gallery.