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In order to protect his eggs from predators, an octopus would secrete milky tears into the water. After she has given birth to one or more babies, the mother octopus will place her eggs in a safe location to ensure that they are protected from predators. Being able to find it high up on the granite cliffs of Monterey Canyon was a huge relief!
As part of their efforts to make this a reality, they will use any resources they can get their hands on, including possibly weird underwater robots. Nothing less than sacrificing its own life would be acceptable to this creature to save the eggs.