Underwater Nations!!!?

[UberPenguin]

I was remaking my entire nation-god settings for a new World War, I finished Abysia-humanbred, then I started on Atlantis, I realized why atlantis was always the bland, same old nation to me... it has no special themes! I was kind of sad at that, then I got to R'lyeh, it doesn't have a special theme either! Why, I ask, do the underwater nations have no special themes?
I also noticed that Jotunheim (is the only?) doesn't have a "normal" theme, but has "Iron Woods" instead of "normal." The other nations I see all have "Normal" there. Why are the underwater nations cursed with no themes, while Jotunheim has three, technically!?