RENO, Nev. (AP) -- Researchers at Lake Tahoe are raising new concerns about non-native, warm-water fish invading the mountain lake's chilly waters, including giant, minnow-gulping goldfish ...

A special native minnow, only found in the middle Rio Grande, is in jeopardy. “I’m very concerned,” Debra Hill, the Branch Supervisor for the Large River Program with U.S. Fish […] ...