For a small fish only found in the San Francisco Estuary, the delta smelt has caused a lot of controversy over the years.

In the Meratus mountain range of Indonesia, researchers discovered two new species of fanged frogs, Limnonectes maanyanorum and Limnonectes nusantara. These frogs were found under the cover of ...

Overall, 18 species had populations that were either rising — including the giant sea bass, green sea turtle, and southern ...

The Aquarium of the Pacific in Long Beach released its first report card detailing the health of 30 species of SoCal marine life. Green sea turtles and giant sea bass are recovering, while several ...

The 8-inch, bright pink slug has been isolated in a "sky island" for millions of years.

A smiley porcupine fish named Steve from Koh Tao in Thailand has captured the heart of thousands and triggered a rise in ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucat n Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...