|The Watcher in The Fellowship of the Ring|
The Watcher in the Water (also called “The Watcher”) was a creature with many tentacles which guarded the West Gate of Moria and lived in a lake created by its damming of the Sirannon. Very little is known about this creature, even to Gandalf. It may have been related to the nameless things below Khazad-dûm, and might have escaped when the Balrog was let loose. It was definitely an evil creature, though it is unknown whether or not it was under the control of Sauron or the Balrog. However, when it attacked the Fellowship as they entered Moria, Gandalf noted that where Frodo had been seized first, there may have been a connection to Sauron in some way, or at the very least the Watcher sensed that the One Ring was present.