White Nudibranch

[Crabs]

Any one ever seen one of these? Kinda stood out on the blue background. He's a hitch hiker of course. And I think he's found a home with the sponge. White with a few black protrusions. Pretty and I don't c any damage to the sponge.

 

[mr_X]

No, but there are so many.
Here:
Marine Flatworms of the World!
Browse that when you have some free time.

 

[Crabs]

As always, I figured I could count on u. Thanks