So after the update with the new lunar island(s), I couldn't help pondering what more islands there could be in future updates.
Since the lunar biome came to be because of a fall from above, maybe a new island could emerge from the seas in a sort of Atlantis fashion? Maybe it also could entail some relatives to the merms that decided not to be on land but came to be later?
Please note that I don't know much about the lore.