Many species use shells and holdfasts to provide stability against strong wave actions.

The shells of shrimp, lobster, and crab provide the basis for these supplements.

Their shells provided an ideal means of transport as they set off in the direction of the harbour wall.

The shells power all the Exchange's plant, and also provides a small surplus that is fed into the local grid.

The shells of diatoms provide a record of their productivity.

If attacked anyway, their shells are resilient, and provide excellent protection.

The original shells may have provided some protection, but the Tsufuru armor is likely superior to that.

These shells provide a home for the crabs and protect them from predators and the elements.

Many such cases include soft padding to cradle the system while an outside shell provides protection from falls or environmental debris.

Empty shells provide homes for hermit crabs and some fish.