This is the largest underwater city. The city is surrounded by thick sheets of ice that are impenetrable. The homo pareo here is very different from the basic model, they are much more adapted for underwater life. I have created copies of this city layout inhabited by modified molusks with longer lifespans. Fishing is present, and I have given them increased critical thinking skills and linguistic capabilities so they can theorize. Many ice covered plants exist, and oceanic ones, and their behaviour may prove essential in future research.