A fishing trip out of Newport Beach, Ca., last week produced an extraordinary catch of a type of octopus that constructs its own shell in which to roam ocean currents. The argonaut, or paper nautilus, was reeled aboard a boat operated by Davey's Locker Sportfishing, which asked social-media followers: "What is this?" The accompanying footage shows the argonaut moving its tentacles from inside its shell and gazing through one of its large eyes. Crewman displays live argonaut.