House Republicans vote to repeal a decision that placed a California fish, longfin smelt, on the endangered species list. Democrats and environmentalists condemned the action.

Longfin smelt have suffered major declines in the San Francisco Bay estuary. Now the federal government has declared the fish an endangered species.

Scientists have discovered the fossilized remains of a new fish species called Ferruaspis brocksi, which lived 15 million years ago, and some of the fish have their final meals preserved inside their ...

Even if flows weren’t needed to protect endangered and threatened species like the delta smelt, the system simply doesn’t have the capacity to store sufficient water to all of its would-be users.

The Delta smelt is on the brink of extinction in the Sacramento-San Joaquin Delta. A UC Davis lab works to save the endangered California fish.

The longfin smelt, a fish the length of a popsicle stick that once fed hundreds of San Francisco Bay animals including humans, was just added to a growing list of endangered species.

Longfin smelt were once abundant in the San Francisco Bay estuary, but populations have declined more than 99% from 1980s levels.

Today's Climate Why Trump Keeps Blaming the Delta Smelt for California’s Water Woes—and What It Could Mean for Endangered Species A small endangered fish is at the heart of a controversy over ...

The “smeltdown in the Delta,” as the extinction trajectory of delta smelt is known according to the Center for Biological Diversity, has left the once-abundant species in critical condition because of ...

The delta smelt is a red herring. What is a legitimate question, however, is why should California and the federal government protect a species that’s essentially extinct?

Scientists have long wondered exactly when smelt and related species arrived in Australia because the fossil record for this group of fish and their ancestors has been notably sparse.