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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biophoto Associates |
Bildgröße: | 5081 px × 3351 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |