The allis shad (Alosa alosa) preserved in a jar with spirits in the National Museum of Natural History "Naturalis" in Leiden, the Netherlands. It is a species of fish in the Clupeidae family.
<a href="//commons.wikimedia.org/wiki/User:Pmaas" title="User:Pmaas">Peter Maas</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>