Nudibranchology (GLAMOROUS SEA SLUGS) with Jessica Goodheart and Terry Gosliner
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In this vibrant episode of Ologies, host Alie Ward dives deep into the dazzling world of nudibranchs—marine mollusks known for their flamboyant colors, bizarre shapes, and astonishing survival strategies. With two leading experts, Dr. Jessica Goodheart from the American Museum of Natural History and Dr. Terry Gosliner from the California Academy of Sciences, the conversation explores the biology, evolution, and cultural impact of these 'naked gilled' sea slugs. From their ability to steal stinging cells from jellyfish and anemones for defense, to their hermaphroditic mating rituals and intricate chemical communication, nudibranchs emerge as masterpieces of evolutionary innovation. The episode also highlights their role in popular culture—from Pokémon to Disney’s The Little Mermaid—and sparks excitement around citizen science initiatives like iNaturalist’s 2026 Sea Slug Search. With a blend of wonder, humor, and scientific rigor, the episode celebrates curiosity, biodiversity, and the profound beauty hidden in plain sight beneath the waves.
Nudibranchs are highly diverse marine slugs with up to 30,000 estimated species—more than all mammals combined.
They survive without shells by stealing stinging cells (nematocysts) from prey and using them for defense.
All nudibranchs are hermaphrodites, allowing any two individuals to mate and exchange sperm, increasing reproductive success in low-population environments.
Their vivid colors often serve as warning signals (aposematism) to predators, advertising their toxicity.
Citizen scientists can contribute to research through platforms like iNaturalist by documenting nudibranch sightings in coastal areas.
…and 3 more takeaways available in PodZeus
Welcome to Nudibranchology: The Glorious Sea Slug Revolution
“Nudibranchs, you may have never heard of one until this moment, but they will slam stars in your eyes so hard.”
First Encounters: How Two Scientists Fell in Love with Sea Slugs
Terry Gosliner shares his childhood memory of discovering his first nudibranch in a California tide pool, sparked by a high school teacher’s promise. Jessica Goodheart recounts her early fascination with sea slugs, including a childhood photo of her holding a sea slug, and how she transitioned from wanting to be a vet to becoming a marine biologist.
The Evolutionary Marvels: From Shellless to Stolen Weapons
“They've figured out some very clever ways to basically exploit chemical defense and chemical warfare as a way of being able to crawl around without a shell.”
Fashion, Function, and the Art of Being a Sea Slug
“Only AI is less creative than the real world.”
Love, Sex, and Cannibalism: The Kinky World of Nudibranch Reproduction
“Sometimes you're just more hungry than horny. Mother Nature knows priorities.”
“Nudibranchs, you may have never heard of one until this moment, but they will slam stars in your eyes so hard.”
“You are all scientists. You are making observations every time you go out in nature.”
“Only AI is less creative than the real world.”
Host
Guests
nudibranch
other
Jessica Goodheart
person
Terry Gosliner
person
Ologies
media
nematocysts
other
Glaucus atlanticus
other
Alie Ward
person
California Academy of Sciences
organization
rhinophores
other
serrata
other
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