Sharks are becoming a popular feature in home aquariums, but there’s a clear distinction between freshwater and saltwater ...

Sharks are saltwater predators that live in the ocean. However, it turns out that a unique shark species, the bull shark, tends to swim outside the box—and right into the freshwater of the ...

The first sharks on Earth: Ancient relatives of sharks first appeared in the world's oceans about 400 million years ago. Today, sharks are classified among the elasmobranchs, which also includes ...

The aquatic world is full of a variety of species called sharks. Most people are familiar with the large, oceanic predators that you can find in waters throughout the world. But fewer people are ...

The World's Forgotten Fishes report is a celebration of freshwater fishes – and it’s a call to action too. Rivers, lakes and wetlands are among the most biodiverse places on earth. They cover less ...

Explore the complex issue of catch-and-release sharks and why stronger measures are needed to protect threatened species worldwide.

This story appears in the June 2016 issue of National Geographic magazine. This summer, we’ll look at three shark species with notorious reputations: tiger sharks, great whites and oceanic ...

TSU Biological Institute and Institute of Oceanology of the Russian Academy of Sciences scientists have compiled a complete annotated list of marine, brackish, and freshwater ichthyofauna of Sakhalin ...