Last sighting •

September 2011 was the last time that the research divers would see the octopus. One month later, they returned to the same spot, only to find that the octopus was gone. At the same time, they spotted the remains of empty egg capsules. Thus the MBARI was soon able to decipher the entirety of what had happened. Photo Credit: kittisun kittayacharoenpong/Getty Images

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