the chemical this killer fish species occurs all along the north american atlantic coast. the killy fish has been a favorite of biology. literally for centuries at they are quite common. they are non migratory. so they reflect their local environments, and each population is unique, in that it is genetically different. it is an adapted to its local environment. so it gives us opportunity for lots of studies. the research as need to observe the development of the fish embryos in the ag, in order to understand at which stages the environmental talks and disrupt the animals, biochemistry or not. ah, so we'll look at the rate at which the embryo is developed in certain features that we know that p c. these can disturb, like a proper development of the heart, evidence of proper development of the circulatory system and proper body side. mm. why, of these particular fish able to resist deadly environmental talk sense? what are the factors that allow individual species to adapt to the city? all parallel developments taking place in cities wild white at the university of toronto,