After a 5.2 magnitude earthquake struck Southern California, elephants at the San Diego Zoo reacted instinctively, forming what is known as an "alert circle" to protect their little ones.

Here are our favorite types of freshwater fish you can keep as a pet. If you're in the throes of setting up a home aquarium, ...

In fact, goldfish are actually an incredibly diverse, hardy, and large species of fish that can live quite a long time. There ...

If you think you're doing the goldfish a favor by releasing it, you're not! Instead, you're setting the stage for an ecological disaster, which could threaten hundreds of other species.

Koi have six types of color cells in their skin ... Koi may just look like an oversized goldfish, but they're not even remotely related. Koi are actually a type of carp, and today they're some ...

Researchers commonly believe that goldfish were the first foreign fish species to make the trans-oceanic leap into North America, with human assistance, of course. The provincial government notes ...