Researchers may have solved a big mystery surrounding a very big fish. Around the world, freshwater fish are in trouble. The fish, a female, weighed 661 pounds, or about 300 kilograms, and set a record for the heaviest freshwater fish ever caught. The discovery was surprising because the species, known as the giant freshwater stingray, like many of the other big fish of the Mekong, is listed as endangered. “It’s a shock and also opens the door to so many questions.”Nearly a third of freshwater fish worldwide are threatened with extinction.

---

Persons: Moby Dick, ”, Zeb Hogan, “ Organizations: University of Nevada Locations: Reno