Diffence between a great white shark and a shark?

there is a slight difference, white pointer sharks have white on there bellies so when they are on top of an enemy and they look up all they see is whiteness. great white shark has whitish grey but they don't use it for the same reason. also white pointer sharks put up their dorsal fin and their tail fin (but the tail slightly shorter than the dorsal) but the great white shark only puts up its dorsal fin.