From Halopedia, the Halo wiki
Navorcas are a species of sea mammal native to Sundown, known for their curious and playful behavior. They traveled the salt water seas of Sundown in crèches, and sometimes peacefully interacted with the cephradons. They were similar in nature to Earth's dolphins.
List of appearances
- Halo: New Blood (First appearance)
- ^ Halo: New Blood, page 48