You may like to eat fish.
Is there any mercury in the fish?
When inorganic mercury spreads out in the water, it is transformed to methylated mercury in the bottom of sediments.
Methylated mercury easily accumulates in living organisms and concentrates through the food change, particularly via fish.
Beware, methylated mercury causes chronic damage to brain.
Mercury is used in batteries, switches/housing and printing boards.
If you still like to eat fish, make sure it does not contain methylated mercury.