What camouflage pattern is exhibited by the yellow-bellied sea snake's coloration, featuring a dark top and bright bottom?

Answer

Countershading

The striking coloration of the yellow-bellied sea snake—dark on the dorsal (top) side and bright yellow or whitish on the ventral (bottom) side—is a perfect adaptation for the open ocean, known specifically as countershading. This technique works against both overhead and underwater visual perspectives. When a potential predator views the snake from above, such as a large seabird, the dark back merges visually with the dark, deep water beneath. Conversely, when viewed from below by a fish, the light belly blends seamlessly with the bright, sunlit surface of the water, effectively breaking up the snake's silhouette in the expansive, featureless pelagic zone.

What camouflage pattern is exhibited by the yellow-bellied sea snake's coloration, featuring a dark top and bright bottom?
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