Colorado Parks and Wildlife (CPW) has announced that the greenback cutthroat trout is naturally reproducing in the state after more than 10 years of rescue efforts to stop it from going extinct. The ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DENVER (KDVR) — Eight years after crews ...

The greenback cutthroat trout, considered extinct for 85 years, was found naturally reproducing in Colorado waters after more than a decade of conservation efforts, officials said. Photo from Colorado ...

Polar fish experience lower mortality than tropical fish, allowing them to delay reproduction until later in life when they are larger and can produce more eggs, according to a study by Mariana ...

A type of asexual reproduction called parthenogenesis, in which an unfertilized egg develops into an embryo, has been observed among some species of birds, sharks, and reptiles in captivity. A report ...

Across the United States, anglers and scientists are noticing the same unsettling pattern: familiar fish are coming out of the water smaller than they used to be. What looks like a subtle change in ...