A mysterious sea creature up to 7 feet long, with 10 arms, a sharp beak and a ravenous appetite, has invaded ocean waters off Northern California. Packs of fierce Humboldt squid attack nearly everything they see, from fish to scuba divers. Marine biologists are working to discover why they have headed north from their traditional homes off South America.
Learn more about the Humboldt squid and this video with the Producer's Notes.