The findings were published in the journal Public Health Nutrition. Japanese people habitually eat small fish, such as whitebait, Atlantic capelin, Japanese smelt, and small dried sardines.

Experts warn: wild fish accumulate more heavy metals and pesticides than aquaculture fish, according to a scientific review.

Fish larvae small as ladybugs darted about ... Yet fish populations around the world, and the animals that eat them, depend on just how many larval fish make it, and in what condition.