Why does the aboral surface of the starfish look clean when compared with dermal surfaces of other marine organisms?

The aboral surface of a starfish appears clean primarily due to the presence of a thin layer of cilia and mucus that help to remove debris and prevent the accumulation of microorganisms and sediment. Additionally, the starfish's unique anatomy, including its ability to regenerate and maintain its body, contributes to a less cluttered appearance. This contrasts with the dermal surfaces of many other marine organisms, which may harbor more algae, parasites, or organic material due to differences in their ecological roles and morphologies.