Scientists used AI to analyze 10,631 freshwater fish species and found that stable, connected rivers are critical for survival.

A major new study shows long-term ocean warming is steadily reducing fish populations, putting global food security at risk.

Southeast Asia’s Mekong River is one of the world’s most diverse and productive freshwater ecosystems, home to more than 1,000 fish species, including both the critically endangered Mekong giant ...

Mesopelagic fish, long overlooked in ocean chemistry, are now proven to excrete carbonate minerals much like their shallow-water counterparts—despite living in dark, high-pressure depths. Using the ...

With under 40 pupfish left in the wild, they are possibly the rarest fish on the planet. With under 40 pupfish left in the wild, these are possibly the rarest fish on the planet. The Devils Hole ...

Restoring a way of life is at the heart of this photograph by Vivian Wan, part of a series that won the New Scientist Editors Award in the Earth Photo 2025 competition. It shows members of the Yurok ...