spiky skin, hard scales shark
Shark skin is not soft and smooth as they it is covered in specialized scales. These scales are called placoid scales or dermal denticles.
no
Dermal denticles. Literally, "skin teeth." They are similar in structure to the teeth of a shark. See http://en.wikipedia.org/wiki/Dermal_denticle
Scales
all fish have scales, including sharks. their scales are just smaller than what you would normally think of as scales
yes it is very thick
Shark
Shark skin looks and feels like it is covered with tiny teeth. In fact, their small, rough placoid scales (also called denticles), have the same structure as sharks' teeth! Shark skin is sometimes used as sandpaper.www.vanaqua.org/education/aquafacts/sharks.html
A shark is a long-bodied fish with a cartilage skeleton, prominent dorsal fin, and scales that are tooth-like.
Shark teeth are made of dentin, a hard tissue similar to bone, covered by a layer of enamel. They have a conical shape and are constantly regenerating throughout the shark's life to replace lost or worn teeth.
A shark's scales, called denticles, reduce drag by creating turbulence in the water surrounding the shark's body. This helps in improving the shark's speed and agility while swimming. The unique shape and arrangement of the denticles also contribute to enhancing the shark's hydrodynamics.