Well Fomoria can get underwater as well, even without needing to research anything. In fact, anyone can once they find some Ichtyid, Shambler or Merman provinces. It should be alright to have a few water provinces at least. Granted this many is probably a little much.
Since nobody wants in the water, We'll switch to Primea (
here).
And with that, we have our players. Give me a few minutes and I'll create the game. so you can send in your pretenders.