6 fish to avoid buying: High in mercury and toxic

4. Salmon (Repeated)
This is a type of sea fish that contains high levels of mercury. If you eat too much, it will increase the risk of methyl mercury poisoning, so mothers should limit buying sea bass for their families.

5. Catfish
Because catfish can grow to a very large size, many fish farmers feed their catfish growth hormones to promote their growth. However, these hormones are the cause of harm to health.