ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Common whelk (Buccinum undatum). This edible marine mollusc can grow up to 11 centimetres in length. The tube extending towards top left is a siphon, which is used to funnel water over the whelk's gills, allowing it to sniff out prey. Photographed in the White Sea, Russia.
Model release not required. Property release not required.