GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Flower urchin (Toxopneustes pileolus). This sea urchin is very poisonous and lethal to humans. Sea urchins feed mainly on algae, but will also eat invertebrates such as mussels, sponges and brittle stars. Photographed in Lembeh Strait, North Sulawesi, Indonesia.
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