Sharks and rays in the Adriatic Sea are dying off. Biologists at the University of Sarajevo have made some interesting discoveries. Many of the animals they have examined reveal evidence of liver disease.

More Global 3000: https://www.youtube.com/playlist?list=PLA0B121ED61CD4326
http://www.dw.com/en/tv/global-3000/s-11487
More environment news:
http://www.dw.com/en/top-stories/environment/s-11798