What is the biological term for the penguin's black-and-white coloration, which acts as camouflage?
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Countershading is a highly effective form of camouflage where an animal's back is dark and its belly is light. For a swimming penguin, a predator looking down from above sees the dark back blending with the dark ocean depths, while a predator looking up from below sees the white belly blending with the bright, sunlit surface. Photo: original author is Fbattail , the image is cropped by Chris huh, Wikimedia Commons, CC BY-SA 3.0.
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Source: Wikipedia (CC BY-SA)
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