Idea for new oceanic terrain types.

[HoneyBadger]

That might take specific work to implement, as in directly modding provinces to reflect their underwater status. But for all that hard work, I bet a large amount of creative energy could shine through. I mean, if one chooses to make such a map, and in the process is forced to mod every underwater province, there's a good chance-depending on the person-that they'll make atleast some of the provinces more interesting, if only to save themselves from death via boredom.