Dark Eel

Dark Eel artwork from the Unleashed art gallery (Wii version).

Dark Eels are Dark Gaia minions encountered by Sonic the Werehog as enemies in the night stage of Arid Sands in Sonic Unleashed. Rearing up from puddles apparently too small to contain them, these hydra-like opponents vomit plasma projectiles in the Werehog's direction, and will flail around violently if the hero gets too close. They can be paralyzed by electrocuting the water with a dropped Thunderball, which then makes punching them to death considerably less hazardous.

The Dark Eel does not appear as an enemy in the Wii version of the game, although its picture is still in the art book. Their serpentine form gives them a passing resemblance to the Dark Moray boss.

“	Dark Eel: These serpentine sneaks dwell in the cracks in the walls and floor, and fire energy bullets from their mouths. As very territorial creatures, they get snarky if anyone tries to enter their nest.	„
— Description from the Sonic Unleashed (360) bestiary