Lake Michigan Coho: DDT Story: Shows why Coho salmon were introduced into Lake Michigan, and how they were commercially marketed. Traces the discovery of DDT in the fish, the research that was done as a result, and the outcome of that research. Discovers death from DDT kill you Coho Salmon (called Fry) as they absorb the last of their yolk sack in infancy. Traces the history of DDT’s commercial use and explains how rain washed this pesticide into lakes. Debates the issue of eating animals which contain small amounts of DDT, such as the Coho.