How did the people of Atlantis go from disaster above water to thriving underwater?
So I've never read any Aquaman comics and I feel it wasn't properly explained in the film.
The Atlantians are this super advanced Human race with cool tech that eventually leads to their downfall and Atlantis is swallowed by the sea. The film stated they evolved to live under water. What? In the 15 seconds it takes to otherwise drown? That would take millions of years.