GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
False fire urchin (Astropyga radiata). The sea urchin an echinoderm, a relative of the star fish. Its exoskeleton shell, or test, is covered in spines that protect it from predators. This sea urchin is found in bays and lagoons with sandy or pebbly bottoms in the tropical Indo-Pacific region. It can reach diameters of 20 centimetres. Photographed in Lembeh Strait, North Sulawesi, Indonesia.
Model release not required. Property release not required.