The conversation between human and AI assistant.
[|Human|] Which types of fish contain the lowest levels of mercury?
[|AI|] The following types of fish contain low levels of mercury: salmon, flounder, Atlantic mackerel, anchovies, pollock, catfish, and shellfish (e.g., clams, scallops, mussels).
[|Human|] 
Which types of fish contain the lowest levels of mercury?