Kraken

; kraken
Difficulty	22
Attacks	Physical 2d4, physical 2d4, drowning, bite 5d4

; kraken
Difficulty	22
Attacks	Physical 2d4, physical 2d4, drowning, bite 5d4
Base level	20
Base experience	1574
Speed	3
Base AC	6
Base MR	0
Alignment	-3 (chaotic)
Frequency (by normal means)	not randomly generated
Genocidable	Yes
Weight	1800
Nutritional value	1000
Size	huge
Resistances	None
Resistances conveyed	None

The kraken, ;, is the most difficult sea monster in NetHack. Like the lesser giant eel and electric eel, it possess the instadeath drowning attack.

Kraken are sometimes a target of reverse genocide, as they are worth a high amount of experience points (even more than the Riders and below only that of some of the demon princes) and only have one hit point outside of water.

Encyclopedia description

                Out from the water a long sinous tentacle 
                had crawled; it was pale-green and luminous 
                and wet. Its fingered end had a hold of Frodo's
                foot, and was dragging him into the water. 
                Sam on his knees was now slashing at it with 
                a knife. The arm let go of Frodo, and Sam 
                pulled him away, crying out for help. 
                Twenty other arms came rippling out.  The
                dark water boiled, and there was a hideous stench.
                        [ The Fellowship of the Ring, by J.R.R Tolken ]