But the plight of the fish also spotlights the perils facing all migratory species in the Mekong, which faces industrial pollution and overfishing. More than 700 dams are built along the river and ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Thousands of fish ...

The Delaware River ... the Maurice River, Cohansey River and Salem River on the New Jersey side. The Delaware Bay hosts the world's largest population of horseshoe crabs. More than 130 species ...

No one saw a Mekong giant salmon carp for 15 years, but then the species was spotted in areas of Cambodia that suggest it may be found in more locations. By Rachel Nuwer The Mekong giant salmon ...