Hammerhead was a sworn brother of the Black Company mentioned in "Wet Dream Fish Story", a short story of the On The Long Run arc. He was only mentioned in the context of his unexpected and unexplained disappearance. To protect crossing livestock, Hammerhead had been installing guardrails on one of the bridges that connected to the forested island inhabited by the centuries-old mermaid fishers named Adelin, Honra, and Eisen Fisher. This was the last time he was ever seen, and he is not mentioned again in the available Annals. His fate is unclear; he could have accidentally fallen and drowned, deserted, or been captured by the mermaids. If the mermaids abducted him, then he was not released like Showboy and the dog Ralf was later.