Fish

A species of fish native to Earth.

These fish can be found on the level Sierra 117, at the part where the Pelicans are shot down by enemy Banshees. If one jumps in the water, you can walk around and see them. They will appear as yellow dots on your radar screen.

They are obviously different from the type of fish seen at High Ground, as they are much larger, differently colored, and lack the odd snout that the High Ground species appears to have.