Energon Eater

Energon eaters are giant space eel-like aliens dwelling in the galaxy, they feed off energon from ships the capture and hunt by scent largely as they can smell flowing  energon nearby. They can also control energon to drawn other ships to their distress calls.

Description
An ''Energon eater resembles a giant large moray eel and has pitch black grey skin with white spots and long antenna. Though they have no eyes, making them blind, therefore they fine prey with the smell of ''flowing energon.  They also have energon powered tails that allow them to take control of ships fuelled by energon, it also known when Energon eaters do come across Cybertronians, they wouldn't stop hunting them until it finishes them off.

Rescue Bots cartoon
In "Unfinished Business", while aboard the Sigma, Heatwave, Chase, Blades and Boulder put a distress signal coming a damaged ship when they are attack by an '' Energon eater. Unable to escape, the Rescue bots are forced ''themselves into stasis and shut down they ship, making the creature leave.