Strolling with a skeptical biochemist
That'easy. It is nudibranch, probabily a bubble raft snail Janthina sp.And I did not look at the catalogue. So long and thank for all the blog.Marco F
Its some type of nudibranch. If you dive in Canada's west coast you'll see a lot of these, although not as colourful. Some are quite large - football sized in some cases.