That started to change with mounting clues: squid beaks and body parts discovered in the stomachs of sperm whales, and occasional dead specimens snagged by deep-sea fishing vessels. These rare finds confirmed the creature's existence and earned the colossal squid the title of largest living invertebrate on Earth,

The video was taken at a depth of 1,968 feet, and the juvenile squid is nearly a foot long. A grown colossal squid can grow up to an estimated seven feet long and weigh up to 1,11

The colossal squid, the world's largest squid species, was caught on video for the first time swimming in its natural habitat, according to California's Schmidt Ocean Institute.