1, protein damage, denaturation or separation from the original astaxanthin will gradually fade.

2. Crab is a crustacean. Because of its complex body structure, it is difficult to make specimens. Use dissecting needle or fine wire with pointed tweezers to mash crab meat.

3. Soak in 5% formalin and then bond with cotton and latex.

4. Put the prepared crab specimen in a cool and ventilated place to dry, and keep it ventilated, away from light and high temperature.