Halo Alpha
Halo Alpha

Wikipedia.png There is more information available on this subject at Sea Worm on the English Wikipedia.

Sea worms swimming in shallow water

Sea worms are tiny, mundane creatures of Installation 04 that can be seen in the shallow waters of the Halo: Combat Evolved level The Silent Cartographer. They wriggle around near the surface of the water and do not interact with the player at all.[1]