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, ...

Neon green, ultraviolet, rainbows — the variety of colors animals can make seem endless. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The ...

In nature, the ability to change color can be key to survival. Vision is a very important sense in much of the animal kingdom, and many animals have come up with unique ways to use this sense to ...