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Ibexes are effectively flattened by countershading, making them nearly invisible against a desert background. There are three in the image. Countershading is observed in a wide range of animal groups, both terrestrial, such as deer, and marine, such as sharks. [17] It is the basis of camouflage in both predators and prey. [18]
The grey reef shark is a fast-swimming, agile predator that feeds primarily on free-swimming bony fishes and cephalopods. Its aggressive demeanor enables it to dominate many other shark species on the reef, despite its moderate size. Many grey reef sharks have a home range on a specific area of the reef, to which they continually return.
This grey reef shark demonstrates countershading, with its darker dorsal surface and lighter ventral surface. Sharks may have a combination of colors on the surface of their body that results in the camouflage technique called countershading. A darker color on the upper side and lighter color on the underside of the body helps prevent visual ...
Grey reef shark: Carcharhinus amblyrhynchos (Bleeker, 1856) Endangered Mostly less than 1.9 m (6.2 ft) maximum 2.6 m (8.5 ft) Pigeye shark: Carcharhinus amboinensis
Countershading is widely used by terrestrial animals, such as gazelles [94] and grasshoppers; marine animals, such as sharks and dolphins; [95] and birds, such as snipe and dunlin. [96] [97] Countershading is less often used for military camouflage, despite Second World War experiments that showed its effectiveness.
In the 41 million square miles of Atlantic Ocean, Gray’s Reef National Marine Sanctuary amounts to a mere speck. But the 11,000-acre square-shaped preserve, 19 miles off the Georgia coast, is a ...
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