The invasive northern snakehead, which has recently been appearing in Missouri and other states, must be eradicated, officials say.

© Ryan Hagerty/USFWS

In Washington, where salmon is a multibillion dollar industry, government staff terminations and budget freezes may put salmon production at risk.

© Grant Hindsley for The New York Times

Thousands of miles from home, North Koreans work on Chinese tuna longliners in the Indian Ocean for pay that goes to their leader, a new study says.