Sharks are becoming a popular feature in home aquariums, but there’s a clear distinction between freshwater and saltwater species. Freshwater sharks aren’t “true” sharks; they are small fish with ...

A new pattern in shark behavior has experts sounding the alarm, and it may have everything to do with an overheating planet. Bull sharks are known to be able to swim between saltwater and freshwater, ...

In a fascinating turn of events, researchers have documented endangered lemon sharks preying on invasive freshwater fish.

Researchers supported by FAPESP recorded lemon sharks (Negaprion brevirostris) preying on an invasive species, the jaguar cichlid (Parachromis managuensis), for the first time. This observation was ...