What is the term for the body covering found on sharks that has a sandpaper-like texture?

The term referring to the body covering found on sharks that has a sandpaper-like texture is "denticles." These unique structures, also known as dermal denticles, are tiny tooth-like projections that cover the skin of sharks and some other fish. Their rough texture reduces drag while swimming, allowing sharks to move more efficiently through the water. Additionally, denticles provide protection against parasites and physical damage, similar to how scales function in other fish types.

The other terms do not specifically describe the texture or structure associated with sharks. "Scales" typically refer to the overlapping structures found in bony fish and do not have the same texture as denticles. "Dermis" is a layer of skin, not a structural covering in itself. "Fins" are appendages used for locomotion and stability in the water, unrelated to the covering of the body. Understanding the role and nature of denticles highlights their importance in shark biology and adaptation.