The system takes 18 photos of each fish less than a second after it has swum into the system. The pictures determine the species of fish, whether it's injured, or if it’s a hatchery or wild fish.

An alarming fish kill on the Darling River at Menindee in outback New South Wales, Australia shows what is believed to be as many as a million dead fish. Menindee, a town of about 500 people, is ...

Some of the fish have spawned in the river and washed downstream, but others have died in Shuswap Lake, before laying their eggs. "There are probably 10,000 to 12,000 here," he says, scanning the ...

Share your photos and videos of sturgeon spawning here: Farther up the Wolf River in Shawano, there has been no activity yet. There is also no activity yet at the De Pere Dam on the lower Fox River.

Colorful fish found in creeks of the Black Warrior River system in the Birmingham, ... Photos used with permission from study authors Julia E. Wood and Zachariah D. Alley.

Scientists have found an endangered native fish in record numbers in the Murray River system, which is great news for the environment and lamprey fish. Photo / Getty Images An ancient, blood ...

The Environment Agency is investigating after reports of dead fish along a stretch of the River Mole, near Gatwick, in Surrey. Geographer Simon Collins, who lives in Reigate, tweeted he had seen ...

The Environment Agency has deployed equipment in an attempt to re-oxygenate the water The Environment Agency is investigating after reports of dead fish along a stretch of the River Mole, near ...