"The Doors of Durin, Lord of Moria. Speak friend, and enter"
In front of the Mines of Moria, Gandalf - Frodo actually - found the password and opened the gate, and the Fellowship got into the Mines. Then the Watcher in the Water came up and caught Frodo.
About this creation
Here is a little close-up of Frodo caught by the Watcher
Aragorn, Legolas and Boromir fighting the tentacles
I like the bank and the debris in the lake. The water looks a little calm for there to be a fight scene going on. Maybe add some foaming splashes in there. I know it would be more work, but it would be worth it. Good job.