Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: slug

Photo: Opalescent sea slug (Hermissenda crassicornis) at the Loveland Living Planet Aquarium in Draper, UT.

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Opalescent sea slug (Hermissenda crassicornis) at the Loveland Living Planet Aquarium in Draper, UT.

Picture of a California sea hare (Aplysia californica) at the REEF, at the University of California, Santa Barbara.

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A California sea hare (Aplysia californica) at the REEF, at the University of California, Santa Barbara.

Picture of a California aglaja nudibranch (Navanax inermis) at the REEF, at the University of California, Santa Barbara.

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A California aglaja nudibranch (Navanax inermis) at the REEF, at the University of California, Santa Barbara.

Picture of a California aglaja nudibranch (Navanax inermis) at the REEF, at the University of California, Santa Barbara.

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A California aglaja nudibranch (Navanax inermis) at the REEF, at the University of California, Santa Barbara.

Picture of a Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

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A Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

Picture of a Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

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A Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

Picture of a Hopkin's rose nubibranch (Hopkinsia rosacea) at the REEF, at the University of California, Santa Barbara.

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A Hopkin’s rose nudibranch (Hopkinsia rosacea) at the REEF, at the University of California, Santa Barbara.

Picture of a Hopkin's rose nubibranch (Hopkinsia rosacea) at the REEF, at the University of California, Santa Barbara.

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A Hopkin’s rose nudibranch (Hopkinsia rosacea) at the REEF, at the University of California, Santa Barbara.

Picture of a Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

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A Spanish shawl nudibranch (Flabellina iodinea) at the REEF, at the University of California, Santa Barbara.

Picture of a California sea hare (Aplysia californica) at the REEF, at the University of California, Santa Barbara.

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A California sea hare (Aplysia californica) at the REEF, at the University of California, Santa Barbara.

Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

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Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

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Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

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Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

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ENV020-00259

Wrinkled marshsnail (Stagnicola caperata) at the Bitter Lake National Wildlife Refuge. The species is listed as endangered at the state level, but not federally.

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