Stephen Hopkins, Underwater Gymnastics (Animal & Nature 2021)

The Donut Doto (Doto greenamyeri) was first added as a species in 2015. They photograph beautifully as they seem to glow and have lines of gold on their body. They are small, between 5mm and 1.5 cm. and normally very stationary. I came across a few of them in the middle of a dive at Talumben, Bali. This was the first time I'd seen one move! It was surprising the agility it showed and the movements showed off the unusual structures on its back. Its easy to see why nudibranchs are often called the butterflies of the ocean -

Images have been resized for web display, which may cause some loss of image quality. Note: Original high-resolution images are used for judging.