06/21/2024

Why It Took Decades For This Octopus To Be Recognized

11:05 minutes

A man in scuba gear with a large underwater camera.
Arcadio Rodaniche diving. Image courtesy of Denice Rodaniche

Octopus mating behaviors can be quite deadly. Many species are cannibalistic, making the entire prospect of mating dangerous, and female octopuses often die after laying one clutch of eggs. Their cannibalistic tendencies mean that octopuses don’t socialize as much as other animals.

But the larger Pacific striped octopus (LPSO) is different. For one, they live together in colonies. And mating is not only a safer proposition, it involves beak-to-beak “kissing.” Plus, females can lay eggs repeatedly, even tending to embryos at various stages of development.

An illustraton of an ocotpus with stripes and dots all over its body.
An illustration of a larger Pacific striped octopus by Arcadio Rodaniche. Image courtesy of Denice Rodaniche

But because these behaviors are so uncharacteristic of most octopuses, the scientific community didn’t officially recognize their existence until 2015, despite the decades-long effort of a Panamanian diver and artist named Arcadio Rodaniche. When he tried to share his findings about the LPSO at a symposium and publish them in a journal, he was flatly rejected. But his persistent research and documentation of the species would eventually be validated when researchers were able to obtain and observe the octopuses in captivity.

SciFri producer Kathleen Davis sits down with freelance science writer Kenna Hughes-Castleberry to talk about an article she reported for Science Friday about the late Rodaniche and his yearslong effort to get official scientific recognition for the LPSO.


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Segment Guests

Kenna Hughes-Castleberry

Kenna Hughes-Castleberry is a freelance science writer and a science communicator at JILA, a physics research institute in Boulder, Colorado.

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D. Peterschmidt is a producer, host of the podcast Universe of Art, and composes music for Science Friday’s podcasts. Their D&D character is a clumsy bard named Chip Chap Chopman.

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Andrea Valeria Diaz Tolivia is a radio production fellow at Science Friday. Her topics of interest include the environment, engineering projects, science policy and any science topic that could make for a great sci-fi plot.

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Kathleen Davis is a producer at Science Friday, which means she spends the week brainstorming, researching, and writing, typically in that order. She’s a big fan of stories related to strange animal facts and dystopian technology.

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In 1990, diver Arcadio Rodaniche’s findings about a highly social octopus were dismissed. Decades later, his work was validated.

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