If the player grabs a medium or large object, like a barrel or crate, and repeatedly smashes it on top of the Kaernk, it will show some yellowish blood where the crate made contact, and the Kaernk will stop moving. However, the Kaernk can actually be killed, and quite easily too. The only exception to this is the Kaernk in the Cellar Archives tunnel in the big room, which is notably bigger and faster than normal Kaernks, and can actually outrun you, as well as hit you while on top of smaller crates in the water. Kaernks are often much slower than you think, and are quite easy to outrun. Chunks of human body parts work even better for distracting the Kaernk, as once it walks over to the flesh it will start to eat, taking as long as ten seconds to fully finish, plenty of time to open a crank wheel as long as you don't panic. This can give you some time to get past it if it was blocking a door, or something else important. However, any object can be thrown far away to distract the Kaernk, and make it go away. As long as you are not in the water, the Kaernk will not move from the spot it stops in, which is often right next to you. However, it is also the most easily fooled monster in the game.

The KaernkSimply called the Water Monster by most players, the Kaernk can be one of the most annoying foes in Amnesia, due to its invisibility.

Amnesia the dark descent gatherers