Even though octopuses belong to a group of shellfish called mollusks, they have no outside shell. A tough skin, called a mantle, covers the octopus’ body. This mantle contains small bags of pigment, or coloring matter, which are connected to the animal’s nervous system.
Any outside stimulus that excites the octopus makes its skin change color. It can change to blue, purple, brown, red, gray, white, and sometimes even striped.
Related Posts
-
Why Do Trees and Leaves Change Color In Autumn and What Causes the Color Change In Fall?
The leaf color changes of autumn result from a complex interplay of factors of temperature, sunlight and moisture, all dependent on timing. Not all the processes are predictable, but it is known that…
-
Why Does Black Tea Lighten or Change Color When You Add Lemon Juice and What Causes the Chemical Change?
The simple answer to why black tea changes color is that adding lemon juice alters the acidity of the tea and the color change is an indication of this. The color change is…
-
Why Are Black Eyes Black and Why Does a Bruise Change Color When It Heals?
Blood released from capillaries and trapped under the skin and breakdown products of hemoglobin in the blood are chiefly responsible for the coloration of black eyes and other bruises. In the case of…
-
Why Isn’t My Pee the Color of the Drink I Had and What Happens To the Color of the Food and Drink We Consume?
Any colored compound that you drink either will or will not interact biochemically with the body's systems. If it does, this interaction, like any other chemical reaction it might undergo, will tend to…
-
Who Made the First Color Photograph In History and How Did James Clerk Maxwell Make the First Color Photo?
James Clerk Maxwell made the first color photograph in history, and he was only 18 when he made it. While he was still at Edinburgh University, Maxwell decided to study how human eyes…
-
What Is the Safest Color For a Car and What Color Car Is Most Visible At Night?
Two different studies indicate that bright yellow and bright blue are the most visible colors for a car. The University of California found that of the two colors, yellow shows up best at…
