My annual favorite at this time of year is the Longhorn (Opalescent) nudibranchs Hermissenda crassicornis. They're not as colorful around here as they are further south but they're still one of my favorites.
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/Opalescent-Nudibranch/i-4hJFGD9/0/M/DSC_4442-M.jpg)
I believe that this one is actually showing the extrusion of the egg ribbon
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/Opalescent-Nudibranch/i-JMGCDtw/0/M/DSC_4476-M.jpg)
Dan