Mercury pollution mainly comes from burning coal. Mercury in coal enters the atmosphere with smoke, and then reaches rivers through atmospheric precipitation and surface runoff. After the action of microorganisms, it becomes toxic methylmercury and enters the food chain. Because pollutants are enriched in the food chain, fierce predatory fish at the top of the aquatic food chain generally have the highest mercury content. Mercury is harmful to the nervous system.
(Fishermen should pay attention: Is it better to catch the stupider fish? The nervous system of stupid fish is more poisoned by mercury. )
So what kind of seafood is low in mercury? The bottom of the food chain and young organisms generally have low mercury content. Sardines, for example, are safer because they eat algae and grow. Small fish, shrimp, mussels and scallops are also safe to eat. The U.S. Environmental Protection Agency recommends that the consumption of low-mercury aquatic products should not exceed 12 ounces (72 ounces) per week, and the consumption of aquatic products with high mercury content should not exceed 6 ounces (32 ounces).
Children, pregnant women, or nursing mothers should not eat any fish with high mercury content, such as shark, swordfish, mackerel, or tilefish.
Human beings are so sinful that the fish in nature have been polluted into poisonous fish!
I haven't seen the figures of China, but it must be even worse.
High mercury mackerel (king mackerel)
List of low-mercury and high-mercury fish in natural resources defense council
Enjoy these fish:
Anchovies anchovies and anchovies
Butterfish pomfret
Catfish catfish
Clam clam
Crab (Domestic) crab
Crawfish/Crayfish crayfish
Croaker (Atlantic) Atlantic croaker
Flounder flounder
Haddock (Atlantic) Atlantic haddock
Hake hake cod
Herring herring
Mackerel (N.Atlantic, Chub) Atlantic mackerel
Mullet mullet
Oyster oyster
Perch (Ocean) sea bass
Plaice sole
Pollock pollack pollock
Salmon (Canned) salmon (canned)
Salmon (Fresh) salmon (fresh)
Sardine sardines
Scallop scallop
Shad (American) shad
Shrimp shrimp
Sole (Pacific) sole fish (Pacific)
Squid (Calamari) squid
Tilapia tilapia
Trout (Freshwater) trout (fresh water)
Whitefish whitefish
Whiting cod
Eat 6 servings or less per month:
Bass (Striped, Black) black striped bass
Carp carp
Cod (Alaskan) Alaska cod
Croaker (White Pacific) white croaker
Halibut (Atlantic) Atlantic flounder
Halibut (Pacific) Pacific flounder
Jacksmelt (Silverside) silverfish
Lobster lobster
Mahi Mahi dolphin fish
Monkfish and monk fish, flat shark
Perch (Freshwater) perch (fresh water)
Sablefish sable fish
Skate ray
Snapper snapper
Tuna (Canned chunk light) canned tuna
Tuna (Skipjack) tuna (bonito)
Weakfish (Sea Trout) sea trout
Eat 3 servings or less per month:
Bluefish
Grouper grouper
Mackerel (Spanish, Gulf) Spanish mackerel
Sea Bass (Chilean)* Chilean sea bass
Tuna (Canned Albacore) tuna
Tuna (Yellowfin) yellowfin tuna
Avoid eating:
Mackerel (King) mackerel
Marlin marlin
Orange Roughy new Zealand red fish
Shark shark
Swordfish swordfish
Tilefish square head fish
Tuna (Bigeye, Ahi)* bigeye tuna