Diaulula sandiegensis
(Cooper, 1862)

Photographed by: Marli Wakeling
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Opisthobranchia |
| Order: | Nudibranchia |
| Suborder: | Doridina |
| Family: | Discodorididae |
| Species: | Diaulula sandiegensis |
Comment from Richard Willan on photo #18182
This is an atypical individual that doesn’t have the dark rings that are usually typical of this species.Comment from Gary McDonald on photo #1512
The brown to black ring-shaped markings are characteristic of Diaulula sandiegensis.Comment from Gary McDonald on photo #2889
In specimens from the southern Pacific coast the dark pigment on the dorsum it is typically in the form of a few rings, in specimens from the northern Pacific coast it is typically in the form of numerous small blotches.Comment from Gary McDonald on photo #2246
It is the typical northern form, in the southern part of their range the brown/black marking of the dorsum are typcially more ring shaped.Locality:
- USA
- California (25) Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Oct, Nov, Dec
- Washington (2) Dec
- Catalina Island (2) May, Jun
- Anacapa Island (1) Dec
- La Jolla (1) Sep
- Santa Cruz Island (1) Feb
- Canada
- British Columbia (12) Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov
- Russia
- Peter the Great Bay (1) Oct