Does the shark need sucker fish to keep clean?

Sharks do not require suckerfish or other species to keep them clean. Sharks have a specific adaptation called "dermal denticles" or "placoid scales," which are small, tooth-like structures covering their skin. These denticles help maintain a smooth surface, deter parasites and potential threats, and create a hydrodynamic surface that reduces water resistance while swimming.

While some marine animals, such as remora or pilot fish, may associate with sharks for various reasons like feeding opportunities or protection, they do not play a significant role in cleaning the sharks. Sharks can effectively regulate their cleanliness through their natural processes and the abrasive nature of their skin against environmental factors.