Why Is a Great White Pale Underneath?

What Crafty Clover says in this video

Intro

Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why is a great white pale underneath?

The Big Idea

A great white is dark gray on top and white underneath. That is a trick called countershading. From above, its dark back blends with the deep, dark water. From below, its pale belly blends with the bright sky.

Dark Back, Seen From Above

Step one: a dark back faces the view from above. A bird or a sea creature looking down sees a dark back against dark water. The shark seems to vanish into the depths.

Pale Belly, Seen From Below

Step two: a pale belly faces the view from below. A fish looking up sees a pale belly against the bright surface. Sunlight shines down, so the white belly matches the light.

The Outline Fades

Step three: the outline fades. Dark above and pale below makes the shark's shape look flat and blurry. Prey may not notice it until it is very close.

A Closer Look

Let's take a closer look at the great white! Its dark back hides it from above. Its pale belly hides it from below. Together, they make a disappearing act.

Quick Facts

Quick facts! Penguins use countershading too. So do orcas and many fish. Nature already painted it. No paint job needed! And watch sharks from a safe distance. Never swim toward a fin.

Think Like a Scientist

Now, think like a scientist! Draw a fish on paper, and color it dark on top and pale underneath. Hold it up and look at it from the side. Does its shape look flatter and fainter? Now ask: why would a white belly fool a fish looking up? And what would a dark belly do instead?

Outro

Two colors make one disappearing act. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!