Cuttlebone

[2] The microscopic structure of cuttlebone consists of narrow layers connected by numerous upright pillars.

Because of this limitation, most species of cuttlefish live on the seafloor in shallow water, usually on a continental shelf.

[8][9][10][11][12] Today, cuttlebones are commonly used as calcium-rich dietary supplements for caged birds, chinchillas, hermit crabs, reptiles, shrimp, and snails.

[17] The cuttlebone has been studied extensively due to its ability to be simultaneously lightweight, stiff, and tolerant to damage.

This combination of mechanical properties has led to research into cuttlebone-inspired biomimetic ceramic foams.

[18] In addition, due to its mechanical properties, cuttlebone has been used as scaffolding in superconductors[19] and tissue engineering applications.

[18] Due to the marine lifestyle of the cuttlefish, the cuttlebone must be capable of both withstanding large compressive forces from the water while avoiding sudden brittle failure.

The cuttlebone of some species under compression has demonstrated a specific energy on par with some advanced foams made from more compliant materials such as metals and polymers.

[17] Crack formation typically occurs in the middle of the vertical walls in the chambered structure of the cuttlebone.