Snails on bottom of tidal pool - enlarged

Descrission:

Longitude (deg): -4.8. Latitude (deg): 55.6. Longitude (deg/min): 4° 50' W. Latitude (deg/min): 55° 40' N. Vice county name: Ayrshire. Vice county no.: 75. Country: England. Stage: Living animal. Identified by: Malcolm Storey. Comment: on bottom of tidal pool. Other taxa shown: (the bottom snail is probably a different species). Category: macro-photograph. Image scaling: enlarged. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.