A California aglaja (Navanax inermis), or headshield slug, winds its way down between the spines of a red sea urchin (Mesocentrotus franciscanus). 2017. Channel Islands, CA, USA
A feathery plume structure belonging not to a bird but to a calcareous tube worm (Serpula columbiana), used for respiration and filter feeding. 2018. Monterey, CA, USA.
A white-spotted dorid (Doriopsilla fulva) peeks over the edge of rock. 2020. Monterey, CA, USA
