The best way to preserve a starfish is to submerge it in a solution of 90% water and 10% isopropyl alcohol. This preserves the starfish in an environment that restricts the growth of bacteria and fungi, which can cause decay. Carefully place the starfish in the jar and make sure it is completely submerged in the solution. Leave the starfish submerged for several weeks or up to 6 months for best results. To keep it looking natural, avoid direct sunlight as this can discolour the starfish. It is important to change the solution every few weeks, as the alcohol tends to evaporate over time. Once the starfish is fully preserved, you can place it in a vase or jar with a lid to protect it from dust.
