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Book 6, Question 35 · Video

Why Can an Octopus Change Color?

Video · 1:57 · Crafty Clover explains, from A Million Whys Book 6

An octopus can match rock, sand, or coral in a blink. Tiny color cells in its skin open and close. It is like having thousands of tiny umbrellas.

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What Crafty Clover says in this video

Intro

Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why can an octopus change color?

The Big Idea

An octopus can match rock, sand, or coral in a blink. Tiny color cells in its skin open and close. It is like having thousands of tiny umbrellas. That is why an octopus can vanish right in front of you.

Eyes Read the Background

Step one: eyes read the background. The octopus looks at the rocks, sand, or coral around it. Its eyes can see shapes and brightness very well. The color cells are called chromatophores, but you can just call them color bags.

The Brain Sends a Plan

Step two: the brain sends a plan. Its brain tells thousands of color cells what to do. Nerves carry the message in a fraction of a second. Muscles pull on each bag to make it wide, or let it shrink to a tiny dot.

Color Bags Open or Close

Step three: color bags open or close. When a bag opens, its color shows. When it closes, the color hides. Together, the colors match the scene, and a hunter looks right past. The skin can change in less than a second.

A Closer Look

Let's take a closer look at the skin! The color bags hold different colors. They open and close to change the pattern. And the skin can even turn bumpy, like a rock.

Quick Facts

Quick facts! Never pull an octopus from its den. Both color and bumps can change. Color is a tool for hiding and hunting. Do not poke a wild octopus.

Think Like a Scientist

Now, think like a scientist! Look at the rocks or leaves around you. Pick a spot where an octopus could hide. Draw the colors it would need. What two jobs can color do? Scientists observe quietly. Happy exploring!

Outro

Color bags turn the octopus into part of the neighborhood! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this