The crocodiles are very aggressive in nature and they seem to be very dangerous to human beings. They are olive green in color and their body has black spots. Their snout is moderately long and pointed in nature. The alligators are less aggressive in nature and they attack only when they are provoked. They are present in steel grey color. Their snout is short and broad in nature. They also have a rounded snout. The Gavialis are very less aggressive and are not dangerous to man because they can eat only fishes due to their narrow throat. They are dark olive green in color. They have a very long and slender snout.