Diving the California Oil Rigs, Part 2
(See Diving the California Oil Rigs, Part 1 here.)
This is the Spanish Shawl, a nudibranch (type of sea slug) common to Southern California. It's tiny, only about one or two inches long. The orange appendages on its back are called cerata, which assist both in respiration and in digestion. They also store the stinging cells of anything the Shawl might eat.
A closer look:
Here's another common nudibranch in the area, the yellow-edged Cadlina:
A Leukartiara jellyfish. I love how it looks like it has a brain!
And some more salp photos:
See Diving the California Oil Rigs, Part 3 here.