That is no cephalopod. First of all squids and octopi have copper-based blood, not iron, so as their blood seeps into the water it would not turn the water red. Secondly, the last photo shows bones that look to be vertebrae arranged in what look to be a spinal cord. Of all the species of Cephalopoda, only cuttlefish have a cuttlebone is not actually a bone, but rather the internal shell of the Cuttlefish, a small, squid-like cephalopod. It is not segmented and is a lightweight, oblong, chalky object that is mainly composed of calcium. In the Cuttlefish, the cuttlebone is filled with gasses and helps control the fish’s buoyancy in the water.
Man you sure know your invertebrate sea dwellers!