What is the purple question mark location for?

[gh0stk1d]

Is it just an easter egg? There are many ducks encased in bones and it seems to be inside of a whale's belly.

[WiseOldFish]

You bring 2-3 ducks to the statue guy and put them in his hand to trade for what he holds in the other hand

[Wabbit. 와빗]

punch the duck