A multi-headed creature from the dimension of Nazgor with a hydra-like body but no eyes
A Hydramander is a multi-headed creature from the dimension of Nazgor. The body of a hydramander is similar to the body of a hydra; however, the hydramander has no eyes. It depends on sound to locate prey (treat as Darkvision out to 60 feet). Thus, a silent opponent is as good as invisible to the monster.
The individual heads of a hydramander may be attacked; 12 points of damage must be dealt to disable each head.
Basic Fantasy Field Guide Omnibus