SCUBAZOO / SCIENCE PHOTO LIBRARY SCUBAZOO / SCIENCE PHOTO LIBRARY
Nudibranch (Thuridilla lineolata) on discarded rubbish. Nudibranchs (sea slugs) are shell-less marine molluscs that live in seas around the world. They have external gills that give the nudibranch its name, meaning naked gills. Photographed in the Lembeh Strait, Sulawesi, Indonesia.
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