Name – Cybermats
Species –  Cyberbugs
Planet – Mondas/Telos
Temperament – Deadly
Appearances - The Tomb of The Cybermen, The Wheel In Space, Revenge of The Cybermen

Cybermats are cybernetic rodents used by the Cybermen for advance attack on Human bases, poisoning and electrocuting people while being almost invisible to any surveillance or security equipment. Cybermats came in two main variants; one resembles a large bug, and the other is a metallic serpent. They also vary in size, some small enough to fit in the palm of the hand. They are capable of homing in on their victim's brain patterns to attack them.