Astacus astacus (L.), structure of the body and anatomy of a male animal. Linearly enlarged 3 times, made in SOMSO-Plast®. After Studiendirektor Christian Groß. The lifelike model shows on the left side the differentiated external limbs, on the right side the internal structure of the crayfish. Movable claws are detachable to demonstrate the position of the internal organs. Therefore the model becomes of special value for demonstration. Model separates into 13 parts. On a stand with green base.