Giant Octopus Ruled Cretaceous Seas as Apex Predator 조선일보Monstrous octopus terrorized seas off B.C. in Age of Dinosaurs, study suggests CBC‘Kraken-like’ giant octopuses 100m years ago crunched bones of prey The GuardianMeet the 19-metre octopus that prowled the ancient seas BBC‘Kraken’ fossils show enormous, intelligent octopuses were top predators in Cretaceous seas Scientific American
