What is it?
‘DOUGHNUT’ NUDIBRANCH Whatever this is, it seems to have more eyeballs than are strictly necessary. Doto greenamyeri is a nudibranch sea slug, only described in 2015. It’s about 15mm long, and those aren’t eyeballs. (Nudibranchs have tiny eyes and very poor eyesight; they can just about distinguish light surroundings from dark.) Those are chemically-protected protuberances known as ‘cerata’, which flamboyantly advertise their toxicity to predators and also function as gills. The cerata have been likened to honey-drizzlers and stacks of pancakes or doughnuts. This beauty, photographed in Indonesia, is grazing on its prey of choice, a colonial hydroid – a coral-like animal that is more closely related to the Portuguese man o’ war.