- "The original Ark was built from white Arkoral, a genetically modified form of coral. Looks nice. Traps CO2. Very smelly to work with."
- -- Ishmael
Arkoral is the material from which the Ark was built. It is a genetically-modified species of coral that is more durable than steel. It is lightweight and, unlike steel, it does not degrade quickly due to exposure to the sea.
One of Joseph Chen's personal journal entries reveals that the Arkoral is starting to become sterile, and break down. This means that the Ark and related structures are starting to decay -- a fact that Chen has kept secret.
- The name Arkoral is a portmanteau of "Ark" and "coral".