Even though freshwater concentrations of mercury are far greater than those found in seawater, it’s the saltwater fish like tuna, mackerel and shark that end up posing a more serious health threat to humans who eat them.
Even though freshwater concentrations of mercury are far greater than those found in seawater, it’s the saltwater fish like tuna, mackerel and shark that end up posing a more serious health threat to humans who eat them.