Leviathan is a haunting and high-octane survival horror manhwa set a century after a catastrophic moon-comet collision plunged the entire planet underwater. In this submerged world, humanity’s reign is over; the deep is ruled by grotesque, mutated sea monsters known as "Leviathans." The remnants of the human race live on massive, decaying ships or floating outposts, constantly scavenging for food and oxygen while fighting off predators that treat humans as mere snacks.

The story follows Bota and his younger sister Lita, who are left to fend for themselves in the vast ocean after their father, a legendary "Harpoonist," sacrifices himself to save them. Rescued and trained by the mysterious and elite warrior Kana, Bota begins his journey to become a legendary Leviathan slayer. Combining brutal underwater combat, intense drama, and a mystery that dives deep into the origins of the flood, Leviathan is a gritty epic of resilience. For fans of Attack on Titan, Solo Leveling, and The Horizon, this series is a cinematic tour de force.

Series Details & Alternative Titles:
Genre: Action, Adventure, Fantasy, Horror, Post-Apocalyptic, Shonen.

Alternative Names: 심해수, Simhaesu, Deep Sea Water, Deep Sea Monster, موجودات عظیم دریایی, Левиафан.