It’s tiny, it’s silver and it’s at the center of a decades-long controversy over California’s water system. It’s the delta smelt. This threatened fish lives exclusively in the Sacramento-San Joaquin ...

Officials are asking Californians to be on high alert as sightings of mountain lions and wolves roaming near human trails ...

Besides Trump's withdrawal already from the Paris climate agreement, advocates fear he'll cut U.S. funding for policing that ...

Mariia Zelenina tells PEOPLE she was "scared" when the Chinese sturgeon "pounced" on her at China's Xishuangbanna Primitive Forest Park ...

The Great Barrier Reef is known for its biodiversity, breathtaking coral formations, and importance in marine life. Learn why ...

Here plastic's impact is staring you in the face. Midway is out of ... Seafood is essential to human life, but there is growing evidence that fish may prefer eating plastic to food.

Along the long road from American icon to endangered species and back again, the bald eagle — the national bird of the United ...

Traditionally, crocodiles were poached primarily for their tail, the loss of which, in most cases, would be fatal to the animal. However, what initially started as a desire for their tails quickly ...

A bizarre fish with human-like lips and teeth has become a viral hit, with over five million views on social media. The video ...

The Trump administration’s decision to close the U.S. Agency for International Development has drawn widespread criticism ...

Fish often avoid intense stimuli ... often seen in doctor's offices with a happy to sad face. "They're for mammals, not just humans, but dogs, cats and raccoons − they're looking for changes ...

It happened around 3 p.m. on Monday, Feb. 3, near the U.S. Coast Guard station at Ponce Inlet. Video posted Feb. 4 by the Volusia Sheriff’s Office shows the mola mola was trapped because it was unable ...