In preparation for NUDI GILL, my debut picture book release in September 2022, I will be blogging about nudibranchs monthly. My hope is that you, too, will fall in love with these colorful little critters. Without further ado, allow me to introduce you to September’s supermodel:

Triopha Catalinae

Photograph by Minette Layne from Seattle, Washington, USA – Salome

Check out that mustache! Unlike other dorid nudibranchs, the sea clown’s dorsal gills are not fully retractable. Triopha Catalinae is comfortable letting it all hang out!

Spotted Triopha, or Triopha maculata, photographed in Morro Bay, California by Robin Agarwal. Sourced from Flickr and shared via Creative Commons License.

The Sea clown also comes in opposite coloration. Which is your favorite? I can’t decide, but I’m loving these fall colors. Makes me crave a pumpkin latte.

Photograph by divindk
Santa Barbara, USA
. Sourced from Flickr and shared via Creative Commons License.

No clowning around, these nudibranchs are small. How many sea clowns could pile into a clown car? Probably all of them!

Who are you calling a clown?

The sea clown’s scientific name is derived from Santa Catalina Island, California, but you can find these nudibranchs in the Western Pacific from Mexico all the way to Alaska. They have also been found in costal areas of Japan and South Korea.

I hope you enjoyed meeting the Triopha Catalinae nudibranch. Stay tuned for October’s NUDI GILL Pin-Up!


Bonnie Kelso writes and illustrates books for children and adults that encourage individualism and brave self-expression. She facilitates art workshops for her local community and beyond. Her debut picture book, NUDI GILL, will be released in September, 2022. A lover of nature and travel, she can be found wandering about outside with her family whenever a good opportunity to do so presents itself.

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