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

The “surprise” birth of a gray nurse shark in Australia is good news for the endangered predator species. Getty Images/iStockphoto Months after endangered gray nurse shark Mary-Lou was seen ...

Months after endangered gray nurse shark Mary-Lou was seen participating in mating activities in an Australia aquarium, the ocean predator welcomed a “surprise” pup, the aquarium announced.