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

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 ...

On Thursday, the Aquarium of the Pacific released its first Marine Species Report Card, detailing the population trends of 30 ...

The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven ...

President Donald Trump issued an executive order to allow federal agencies to override state policies to maximize water amid ...

California is investing $15 million to offset climate change threats to salmon and steelhead trout in river and stream ...

The Western population of the monarch butterfly hit a near-record low with fewer than 10,000 found living in California this ...

In an apparent poke at California politics, one of President Donald Trump's executive orders on Monday directed federal ...

Hundreds of endangered fish were evacuated from Topanga Creek after the devastating Palisades Fire ripped through the area.

A Trump executive order directs agencies to 'to route more water' across the state. But some say there's a lot more at stake.