A friend showed me a photo of a Leaf Sheep Sea Slug, apparently a real creature that actually exists. It doesn’t really look like this, but it’s how I remember the photo looking.
I went back to find the photo, and it is so much better than my memory of it!
Thank you Jeff!
eyespider 
Sea slugs are so beautiful, they deserve a nicer name!
Although, Nudibranch sounds sufficiently absurd for them, I think!
https://www.thoughtco.com/all-about-nudibranchs-2291862