Is a starfish a hydro static skeleton or a exoskeleton?

A starfish has a hydrostatic skeleton, which means it relies on the pressure of its internal fluids to maintain its shape and support its body. This type of skeleton allows for flexibility and movement, enabling the starfish to navigate its environment. In contrast, an exoskeleton is a rigid external structure found in organisms like insects and crustaceans, which is not applicable to starfish.