User blog comment:Destructor69/Grabbers/@comment-30868164-20170218012204

Looking at the concept art, I'm guessing it will be on the boarders of the Safe Shallows, but it may never be added. There are a lot of concept arts that are never going to be in the game.

But, if we knew it was going to be added but not when, I would guess after Subnautica is officially released (version v1.0).