Presumably killed by a deep-diving predator, such as a sperm whale or a beaked whale, that took out the head and a large chunk of internal organs, this bottom-dwelling female Atlantic giant octopus
(Haliphron atlanticus) was observed floating off the Azores in about a thousand metres of water. But why was it partially eaten? Some think that with an abundance of food, predators can be selective and only take the choice cuts from their prey. Perhaps the energy yield from the head and internal organs is higher than from the remainder of the mantle and tentacles. Another theory is simply that an event interrupted the meal, after the fatal bite had been delivered. As with so many mysteries of the deep, the photograph raises more questions than it alone can answer.