Sea Leviathans are extremely powerful crustacean Danger Beasts that appeared in the timeline of Tatsumi ga Shinryaku!.
Sea Leviathans resembles a colossal combination of a squid, a shrimp, a crustacean and a dragon.
Known Sea Leviathans
Penumbra Ordo's Karathen
Karathen is a Sea Leviathan saved and allied by Tatsumi during her fight against Freak Eaters in her infancy. She