Sea urchin detail. Close-up of the spines and the ambulacral system of a purple sea urchin (Paracentrotus lividus). The ambulacral,or water vascular,system is a network of fluid-filled canals unique to echinoderms,which functions in gas exchange,feeding,and locomotion. Photographed in the Mediterranean Sea,Alicante,Spain | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fitor, Angel |
Taille de l’image : | 3425 px × 5117 px |
Model Release : | Non requis |
Restrictions : | - |