Twelfth and last piece in the series dedicated to colorful creatures. This series of 12 pieces illustrated by animals was issued to the rhythm of a room every quarter in the years 2016 to 2019. Partially colored, These pieces have the distinction of being luminescent in the darkness, just like certain night species, the animals appearing on these twelve pieces become active at night by creating a light effect.

-The internal part of the room represents a crayfish in its natural habitat with in the background an aquatic herbarium, some rocks and a fish. years the lower part, the inscription "Flusskrebs" (crayfish)and the 2019 vintage.

The reverse is a composition common to this series with a representation of the 12 animals of this series La Chauve-Souris, the Tiger, the Crocodile, the Martin-Fisher, the Wolf, the Parrot, the Shark, the owl, the frog, the turtle, otter and crayfish. Between animals, stylized representations of the flora and the name of the emitting country "Republik Osterreich" and the nominal value 3 euro.