Soil-Free Farming at Sea? I Maxed Out Algae Technology

Strong female lead + ensemble of women + farming + light sci-fi + no romance + ocean

In an age of cataclysm, the continents sank forever into the abyssal sea. Ecologist Ling Shuying, bearing the blame for a crime, flees to the civilization's graveyard known as Wave Ruins with forbidden algae seeds in her possession. There, she meets a mutant hunter who can foresee deadly threats from the abyss, a one-armed engineer obsessed with restoring ancient machines, a mysterious shaman who can communicate with giant beasts, and an exiled administrator who holds the key to freshwater across the region.

Faced with technological blockades from the Thousand-Sail City-States, ecological sanctions from the Coral Pact, and the deep-sea threat of the Children of the Abyss, they turn Wave Ruins into their laboratory:

Farming: cultivate fertile soil, build a living water network, and anchor floating continents

Intrigue: wage algae warfare, control weather weapons, and establish an abyssal economy

Conquest: build the epic floating city of the Circulation Alliance Capital and create the Treaty of Calm Seas to rewrite civilization's rules!

When acidic fog devours the throne and giant beasts tear fleets apart, only those who command the power of ecology can lead humanity through the Age of the Abyssal Sea!