Everyone knows the tiger, the panda, the blue whale, but what about the other five to thirty million species estimated to inhabit our Earth? Many of these marvelous, stunning, and rare species have ...

NEWPORT, Ky. -- It’s just past 2 p.m., and four enormous shadowy figures lie in wait just below the surface of the water in Newport Aquarium’s Amazon Exhibit. Feeding commences. While the tank is ...

Released aquarium fish and warm water allow species like this to survive and spread. This video uses a real catch to explain how invasive fish disrupt local ecosystems.

A keystone species of the Amazon River ecosystem, the arapaima is a powerful predator known by many names. Mike Bock Reaching up to 10 feet (3 meters) long and weighing 440 pounds (200 kilograms), ...

Measuring 10 feet (3 meters) long and weighing in at more than 400 pounds (180 kilograms), it's hard to imagine that the arapaima, the largest fish in the Amazon River basin, could ever go missing.

Like youngsters leaving home on the first day of kindergarten, the Milwaukee County Zoo's two arapaima fish needed a bit of coaxing. Though arapaima are among the world's largest freshwater fish and ...

They're growing and learning their targets during daily training and soon they will venture off to the big tank. Only 9 inches long when they arrived two years ago at the Milwaukee County Zoo, two ...