Environment ❯ Ecology

Aquatic Ecosystems

Fish Populations Freshwater Fish Water Quality Fish Species Freshwater Biology Invasive Species Freshwater Lakes Pollution Fish Mortality Freshwater Ecosystems

Yellowstone Orders Daily Afternoon-to-Sunrise River Fishing Closures

Record-warm river temperatures with low flows are stressing and killing trout, prompting emergency limits to protect fish populations.

Transmissible Melanoma Found Spreading Among Catfish in Lake Memphremagog

Scientists Identify Likely Transmissible Melanoma in North American Catfish

Scientists Confirm Transmissible Melanoma in Brown Bullhead Catfish

Scientists Warn Dissolved Oxygen Is Falling Across Global Waters

European Catfish Surge Prompts Targeted Control at Lake Garda and Bodensee

Kelheim Issues Ban on Swimming in Danube After Dogs Fall Ill

Italy’s Native Freshwater Crab Rediscovered in Lake Garda

San Carlos Lake Closed After Mass Fish Die-Off

Elbe Oxygen Falls to Acutely Dangerous Levels Near Hamburg

More Than 20,000 Fish Killed on River Glyde

Hazardous Algae Advisory Issued for Two Lake Nokomis Beaches

Thousands of Fish Found Dead Along 20-Mile Stretch of the Chattahoochee River

Hundreds of Fish Found Dead in Delhi’s Sanjay Lake After Heatwave and Pipeline Leak

Most of the World’s Rivers Are Losing Oxygen, Global Study Finds

Assam Announces Rare Fish Found in Goalpara’s Underground Waters

Researchers Map Flooded Buenos Aires Quarries for Pejerrey Farming and Safer Recreation

U.S. Slashes Lake Powell Releases, Taps Flaming Gorge to Protect Hydropower

Mexico Water Agency Cites Salinity Shock From Open Lagoon Gate in Veracruz–Tamaulipas Fish Kill

Ottawa Marks Start of Contrecœur Port Expansion With $1.16 Billion Canada Infrastructure Bank Loan