Protecting and Restoring the Morro Bay Estuary.
Hermissenda opalescens

Sea Slug of the Month: Morro Bay’s ‘Gateway Nudi,’ Opalescent Nudibranch, Guest Post by Robin Agarwal

Three Opalescent Nudibranchs (Hermissenda opalescens). Photograph courtesy of Robin Agarwal via Flickr Creative Commons License

    “Whoaaaa…what is THAT?” “It’s gorgeous, whatever it is.” “It’s moving!” “Dude, check this out!” “So BLUE!” “What IS it?” Music to a science educator’s ears, of course, thanks to the astonishing colors and reasonably viewable size of one of California’s most iconic sea slug species, the Opalescent Nudibranch (Hermissenda opalescens). Found throughout the Central California coast, these brightly-colored carnivores are often the first nudibranchs to astonish and delight the humans venturing into their intertidal world during seasonal low tides. Photograph of Opalescent nudibranch, (Hermissenda opalescens) taken in Monterey, California. Courtesy of Robin Agarwal, under Creative Commons license via …

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