<i>Neptunea contraria</i>, a left-handed whelk; treated as a synonym of <i>Neptunea antiqua</i> (Linnaeus, 1758) in Howson &amp; Picton (1997)
Georges Jansoone (<a href="//commons.wikimedia.org/wiki/User:JoJan" title="User:JoJan">JoJan</a>)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span> - photo made at an sea aquarium