6.8 mm long. Found in a shallow, low intertidal pool at South Casa Reef. CASIZ 189422.

This is Eubranchus sp. 2 of Behrens & Hermosillo (2005), which so far is only known from La Jolla, California and remains undescribed. Note: in April 2021 we found one at Tar Pits Reef in Carpinteria, Santa Barbara County: https://www.inaturalist.org/observations/75602522

The white patch on the head, reddish hepatic region, white anal papilla, and rings of papillae on the cerata are distinctive.

The 3rd and 4th images show egg masses, containing early and late-stage embryos, respectively, laid by adult pictured here. The last image shows a newly hatched veliger larva, right lateral view, with a shell 210 microns long.