In 2007, Bruce Robison’s robot submarine stumbled across an octopus settling in to brood her eggs. It seemed like a small moment. But as he went back to visit her, month after month, what began as a simple act of motherhood became a heroic feat that has never been equalled by any known species on Earth. 

This episode was reported and produced by Annie McEwen. 

Special thanks to Kim Fulton-Bennett and Rob Sherlock at the Monterey Bay Aquarium Research Institute. And thanks to the Indianapolis Chamber Orchestra for the use of their piece, “Concerto for Bassoon & Chamber Orchestra: II. Beautiful.” 

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If you need more ocean in your life, check out the incredible Monterey Bay Aquarium live cams (especially the jellies!): www.montereybayaquarium.org/animals/live-cams

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