Sea urchin. Sea urchins are marine echinoderms,relatives of the starfish. They possess a shell,or test,covered in numerous movable spines,which protect them from predators. The sea urchin test has five-fold symmetry. They feed on algae and other organic material that they scrape from the surface of rocks | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Biophoto Associates |
Taille de l’image : | 5081 px × 3351 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |