Researchers examine a finless porpoise and inject an ID chip into it in Anqing City, East ?China?’s Anhui Province, March 6, 2016. Experts injected ID chips into six finless porpoises, which are threatened by overfishing, pollution and ship movement at the Yangtze River, to better monitor their growth. One finless porpoise born in June 2015 weighed 19.5 kilograms now.