While searching through the monster section of the in-game store, I came across a slot that shows Elder Kraken available for purchase at the price of $0.01. Selecting it does nothing other than play the sound that normally plays when you select a menu option. Restarting the game and connecting to the multiplayer servers do not change, or correct this.
(Elder Kraken also shows up in the same manner under the “All” section of the store.)
Just thought I should say something as I couldn’t find this bug reported anywhere else.