Anchoveta are processed at a fish meal factory in Lima, Peru in 2009. Peru and Chile have the world's largest anchoveta fishery, making them the world's largest producers of fish for fishmeal.
Ernesto Benavides/Getty Images
Concerns about mercury contamination have led many pregnant women to under-consume seafood. So the FDA issued a new chart explaining what to eat and what to avoid. But critics say it muddles matters.
The half-naked hatchetfish,shown here munching on a shrimp, is just one of many billions of mesopelagic ocean fish that migrate up and down the water column each day to hunt food and avoid predators.
The New Jersey Department of Environmental Protection and Department of Health advise against eating any fish from the Lower Passaic because it may be contaminated with toxic chemicals. But Owaldo Avad says he's been catching and consuming fish like these from the river for eight years.