Olfmeri

The Sky Leviathan, colloquially referred to as the space whale, was a creature a joint UNSC–Swords of Sanghelios task force encountered during an expedition to Installation 00 in 2555.

Production notes
The Sky Leviathan was planned to be featured in Halo 4. It was an enormous flying whale-like creature that would have lived on Requiem. The concept art were drawn by 343 Industries artist Paul Richards.

List of appearances

 * Halo: Hunters in the Dark