Corystes cassivelaunus - Male <a href="https://en.wikipedia.org/wiki/Masked_crab" class="extiw" title="en:Masked crab">Masked crab</a> from the Belgian Coastal waters.<br> Carapace width: ~25 mm © Hans Hillewaert - CC BY-SA 4.0 - Wikimedia Commons
Domaine de Beauguillot - Sainte-Lucie