When they swim and the sun beams on them 24 hours the grey reflects the sun so they dont get burnt
Sharks can only see in shades of grey. Findings from a study by Australian scientists, released in September 2012, show that sharks' eyes have just one type of cone opsin - or light-sensitive proteins found in the photoreceptor cells of the retina - instead of the two or more that are needed to see colour. Cone opsins are used to help animals see in bright light, and to differentiate between colours.
Because of moss and other forms of vegetation that grows on the crocs body. They also eat lots of cabbage, lettuce, broccoli and spinach.
Their main diet is mostly consists of reef fish. They also eat lobsters, or cepholapods(squids, octopuses). Sometimes they'll eat shrimps or crabs too. For more info you can go to: http://marinebio.org/species.asp?id=93
Gray reef sharks are opportunistic predators that primarily feed on various bony fish, crustaceans, and cephalopods. They use their sharp, serrated teeth to grab and consume their prey. They are fast and agile swimmers, allowing them to actively hunt and chase down their food.
Mako sharks, thresher sharks and Great white sharks
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
gray sharks eat all sea animals exept for whales and dophins and mermaids. they bite humans too.
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 light gray color
they are a bluish gray color
Usually great white sharks are white and gray and blue-gray.
They live in the reef haha