It can be obtained via Ice Fishing or sometimes when killing a Slippery Northern Pike. 5 are needed for The Hunt for the Sea Serpent Quest, and 1 is needed for the Hot Cuisine Quest.
Creature dossier
Northern Pikes
Race key northernpike
Creature intel
Notes and Lore
History
This was an Unobtainable Item from Update 7.2 until Update 8.0. It was previously referred as "Big Fish" by the players and it was thought to be fishable at some special spot or at a specific fishing skill.