young pink salmon infected with sea lice ...Canada's west

A grizzly bear holds onto a freshly caught pink salmon is seen in this undated handout photograph. Infestations of sea lice at salmon farms on Canada's west coast are threatening local wild pink salmon populations and could result in their extinction in another four years, Canadian researchers said on December 13, 2007

A young pink salmon infected with sea lice is pictured in this undated handout photograph. Infestations of sea lice at salmon farms on Canada's west coast are threatening local wild pink salmon populations and could result in their extinction in another four years, Canadian researchers said on December 13, 2007.