Crabs in the Chesapeake Bay are the same. About 80% of tidal segments there are contaminated with PCB's and heavy metals. Regulators describe them as "impairmen

Crabs in the Chesapeake Bay are the same. About 80% of tidal segments there are contaminated with PCB's and heavy metals. Regulators describe them as "impairments", and recommend not eating them more than once per month. Cod are bottom feeders and are affected by pollution that settles to the bottom.