no,not all sharks are grey but most of them are.
gray sharks eat all sea animals exept for whales and dophins and mermaids. they bite humans too.
Humans and larger sharks will eat gray reef sharks.
grey sharks
Sharks can be practically any shade of gray (blue gray, dark gray, light gray, etc.) and they can also be black.
Bull Sharks Are Gray Actually they are brown look it up on google images.
no
great white sharks,tiger sharks,bull sharks,gray reef sharks, blacktips and whitetips.
Sharks have gills on the side of there neck to filter oxygen from the water :]
they are a bluish gray color
they are a light gray color
Usually great white sharks are white and gray and blue-gray.
They live in the reef haha