Freshwater sharks aren’t “true” sharks; they are small fish with shark-like features, such as a pointed nose and streamlined body. Saltwater species are real sharks, and you can keep some ...

The blue shark is a carnivorous fish that lives in deep oceans all around the world. They can swim fast and are very good at hunting other fish. A pike is a freshwater fish that lives in lakes and ...

This story appears in the April 2017 issue of National Geographic magazine. Hundreds of millions of people worldwide would lack their prime source of protein without freshwater fish. Yet the lakes ...

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked in mystery. No one is sure how many giant stingrays are left, which habitats they prefer ...

Water type: Archerfish are brackish water fish, meaning they need water that is a mix of freshwater and saltwater. 2. Tank size: They require a large tank, to thrive. 3. Water parameters ...