These gorgeous, long-tailed marine creatures—formerly known as Siamese fighting fish—have been famous for centuries for their aggressive nature, which breeders have exploited in order to fight them, ...

Chameleons have built a pretty solid reputation on two commonly held beliefs: They can stealthily blend into their surroundings, and they are the ideal subjects for iconic '80s anthems. But it turns ...

Blue-nosed chameleons, a lizard species found only in northern Madagascar, are known for their colorful noses, which brighten when they get excited. For many years, lack of data meant the blue-nosed ...

Blue sharks have become very well known for the color of their skin, but new research indicates that these iconic sharks might be more than meets the eye. In fact, blue sharks might just be one of ...

Add Yahoo as a preferred source to see more of our stories on Google. Closeup shot of a Labord's chameleon on a tree branch on a sunny day© Wirestock/iStock via Getty Images The post A Beautiful ...

What a great question, Ikechukwu! It doesn’t have a simple answer, though: yes, chameleons do change color when they sleep, but we think it happens in a different way to when they’re awake. People ...

You’ve probably heard that chameleons change color to blend into their background in order to hide. But that might not actually be true. So what do they actually use this color-changing ability for?