ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Lined chiton and nudibranch eggs. Lined Chiton (Tonicella marmorea, left) next to a spiral-shaped clutch of nudibranch (sea slug) eggs. Chitons are primitive, slow moving molluscs with shells composed of multiple plates, which feed on algae on rocks. Nudibranchs are shell-less marine molluscs with external gills.
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