Saw this growing on some kelp last night

[scubaman5000]

Anyone know what this is?

http://www.flickr.com/photos/37706015@N06/3556040532/

My guess is that it's some kind of Bryozoan or something? There was also some growing on a Sheep crab that was in the area as well.

 

[diversteve]

I'd ask drbill

 

[donnyb]

Hooded nudibranchs,
link to individual animal below, and attached image is of a mating aggregation.
W.A.N.T. Photography

 

[scubaman5000]

Wow, thanks for that. I never would have guessed that these were nudibranchs but you're right. That's what I saw. Now I have to get out there and see if I can find them again and get a closer look.