Comparisons are made between a smooth bump and one where the lee side is covered with replicas of shark denticles – dermal scales that consist of a slender base (the neck) and a wide top (the crown).

All those denticles point backward ... Those grooved channels disrupt the flow, forcing the water past and away from the shark's body, significantly reducing drag and even pulling sharks forward.

sharks, rays, skates, and chimaeras are cartilaginous fish, meaning their skeletons are made of cartilage, not bone. Their skin is covered with denticles, tooth-like scales that differ from the ...

Old lineage cartilaginous fish like sharks, skates and rays that have skin which contained small spiky scales or "dermal denticles" may be the key, scientists say. Cambridge University said their ...

Denticles found on a shark’s nose might be flat and round, resembling the patched surface of a soccer ball. But elsewhere on the body the denticles might look like overlapping cupped hands with ...