Shark Skin A shark’s skin is made up of dermal denticles with longitudinal grooves that help a shark swim faster and water. The deticles create tiny vortices in the water just like dimples on a golf ball create air vortices. Barnacles and algae are not be able to attach themselves to the shark’s skin because of these denticles. Sharks have very thick skin. Whale sharks have especially Keep Moving They have to keep swimming or they will sink! Some sharks can swim up to 40 mph. Some are slow- and plants to eat. motion. If a shark needs to move backwards, it uses gravity to fall, not swim backwards. Sharks must swerve to the side in order not to hit something - they cannot simply stop.
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