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What haa a dark top and a white bottom?

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A bull shark
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Why is a killer whale dark at the top and light at the bottom?

  A killer whale's coloration is a form of camoflage called 'countershading'. When viewed from above, the orca's black back helps it blend into the dark water; when viewed

Why do frogs have a light colored bottom and a dark top?

Think of it like this..... If a predator is looking down from the sky, the dark top of the frog will blend well with the ground and dark waters. And if a predator under the wa

Can the moon be dark on top and light on bottom?

From our vantage point, this is possible just after sunset when the moon is in the waxing crescent phase, or just before sunrise when the moon is in the waning crescent phase,