What is the best known shark?
the great white shark
No a shark doesn't benefit from the relationship with a remora. When two organisms benefit from their relationship that is known as mutualisim. A remora lays on the surface of the shark catching all the leftover food from the shark. The shark doesn't benefit or get harmed by the remora and this relationship is known as commensalism. There is also parasitism which is when one organism benefits and one is harmed.
There are more than 440 known species of shark, and these can be classified amongst 8 different orders. The most widely known sharks belong to the following orders: Squaliformes: Includes dogfish. Orectolobiformes (or carpet sharks): Include zebra shark and nursing shark. Carcharhiniformes (or groundsharks): Include tiger shark, reef sharks and hammerhead shark. Lamniformes (or mackerel sharks): Include thresher shark, mako shark and great white shark.