Why do starfish stick to the rocks?

Starfish stick to rocks primarily to avoid being swept away by waves and currents in their marine environment. Their tube feet, which operate using a hydraulic system, allow them to create a strong suction against surfaces, helping them cling securely. This behavior also aids in locating and feeding on organisms like barnacles and mollusks that live on rocky substrates. Additionally, staying attached to rocks can provide protection from predators.