How can a Seas tar be flexible and rigid?

A sea star exhibits both flexibility and rigidity through its unique body structure. Its flexible arms are made up of a series of ossicles, which are small calcareous plates that allow for movement and bending. This adaptability enables the sea star to navigate various environments and hunt for prey. Simultaneously, the overall structure provides rigidity, allowing it to maintain its shape and withstand environmental pressures, such as waves and currents.