Cave-Troll in the New Line film
Large, wicked beings who mainly lived in the Misty Mountains. Cave-Trolls were a breed of Trolls that turned to stone in sunlight. They enjoyed feasting upon elves, men, dwarves, hobbits, wizards, and even orcs. They would often have to leave the mountains to fetch their food. Though very large and dumb, Trolls knew their way through the darkness of Moria very well. In 3018 of the Third Age, the Fellowship entered Moria and were heard by orcs and a Cave-Troll. The Troll seemed unable to be killed at first, but was then brought down by the spear of Legolas, the Axe of Gimli, the swords of Aragorn and Boromir, the staff of Gandalf, and the courage of Frodo Baggins and Samwise Gamgee. The fighting awoke a Balrog, who was much worse than the Troll. No other Cave-Troll was ever mentioned, but there were certainly other trolls.