fish migration

Chinook make their way up the Klamath River every year, but fewer and fewer arrive in the spring.

Various concerned groups have been petitioning NOAA Fisheries to list spring-run Chinook salmon in Oregon and Northern California for over a decade.

Mahi-mahi were more likely to be eaten and less likely to spawn after being exposed to sublethal concentrations of oil, raising concerns about the risks oceanic drilling pose to life in the ocean.

An analysis suggests that a commercially important mass migration of fish may have no real adaptive value.

Watch scenes from the Maumee River in Ohio, where researchers are stocking an ancient fish species that is struggling against extinction.

Scientists examine floating traces of DNA left by fish to better understand New York’s aquatic life.