The Environmental Defense Oceans program is dedicated to preserving and protecting marine ecosystems and fisheries using practical solutions. Their list of Best and Worst Seafood Choices helps us choose fish that we can include in our diets, while remaining conscience of our impact on marine life. Unfortunately, we do not have the choice to eat all of the seafood that we would like, due to high levels of mercury that are found in fish, as well as other harmful chemicals found in fisheries. Read more about these issues on the Oceans Alive website.