This photo comes from Microsoft co-founder Paul Allen. It show a school (?) of nautiluses devouring some chicken. Allen owns a large yacht called the Octopus, which has a couple of ROVs on board. This photo was taken by one of the ROVs at a depth of 876 feet, near the Pacific island of Palau.
The Argonauts are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. It is used as a brood chamber and for trapped surface air to maintain buoyancy.