This octopus seems to be holding the uneaten sticky remains of a jellyfish in its grasp© 2017 MBARIBy Maria BolevichAn elusive deep-sea giant has been filmed with its prey for the first time. It turns out it eats jellyfish and other gelatinous animals. The octopus, Haliphron atlanticus, was filmed swimming docked on top of a medusa jellyfish, with...