Fish rank as the most diverse group of vertebrates in the world. Scientists recognize over 37,000 distinct species, with many more waiting to be discovered. Most fish fall into the ray-finned group of ...

Wild populations of the rare Maccoa duck, an African wetland species, have been dwindling for decades. There numbers are estimated at only 5,000 wild individuals. But the United Kingdom’s Chester Zoo ...

Survival of the fittest is expertly exemplified by one marine creature: Minnesota’s freshwater mussels. These shellfish are being applauded for their unique and clever survival strategy. They ...

Whales may be known as gentle giants, but they still have a looming presence as the world’s loudest and largest animals. The Antarctic blue whale can weigh up to 400,000 pounds and stretches to 98 ...