Zap-jelly
From Halopedia, the Halo wiki
Zap-Jellies are predatory sea creatures that live in the brackish seas of the Grunt homeworld Balaho. They glow with a faint pink light. Grunts find them very tasty. The translation "Zap-Jellie" may mean that this creature is similar to the Medusa cnidarians (jellyfish) that are indigenous to Earth.[1]
Sources
- ^ Halo: Contact Harvest, page 186