Dominant males of an Indonesian species of fish turn black during periods of heightened aggression, scientists have discovered. Their blackened markings, which quickly emerge at the start of a ...

As one of the world’s most diverse vertebrates, fish can come in a variety of shapes, colors, and sizes. With over 33,000 species inhabiting the Earth’s aquatic habitats, some are bound to be a bit on ...

Aquariums have fascinated people for centuries. The idea of having a slice of the underwater world right inside your home has a charm that never fades. For many, keeping fish is not just about adding ...

A fight between two juvenile tomato anemonefishes of a similar size, filmed in the wild. These highly territorial fish recognize each other by their color patterns and size. Growing up, you probably ...

Aggressive little male fish from Indonesia turn black when angry to show their dominance, scientists discover. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...