Why are there so many species of coral reef fish? According to a new study, it’s because about 50 million years ago, some ...

Scientists are studying the salmon in the Great Lakes to predict how the invasive fish might affect larger ecosystems.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Paleontologists ...

Shark sightings on the east and west coasts have been on the rise as Americans flock to beaches in hopes of cooling off. In Hawaii, a tiger shark was recently spotted swimming 30 yards from the island ...

North America's largest freshwater fish, in fact — could find its way into a couple of small Utah lakes. The Utah Department ...

When most people think about biodiversity in lakes and rivers, they imagine fish, plants, or perhaps birds and amphibians. But beneath the surface exists another world that often goes unnoticed: ...

Running down a list of the best tasting fish isn’t easy or totally fair. Taste is subjective, after all. It’s a matter of opinion. We could argue for days over whether Burger King is better than ...