Species Location Weapon Abilities The voltaic eel, also known as the mutant fish or sewer mutant, is an enemy in The Lost Frontier. It appears in two forms, the first in two missions and the second in one mission. The first type is a simple, blue electric eel, whereas the second type is a gold form with an energy shield. It is presumed the eels were used by the Aeropans as a power source and as experiments for the Dark Warrior Program.