
Predatory fish like tuna accumulate extra mercury by eating other fish.
Because they are low in the food chain, sardines are low in contaminants, such as mercury, relative to other fish commonly eaten by humans, and have a relatively low impact in production of greenhouse gases.
For comparison (bluefin tuna):
since bluefins require so much food per unit of weight gained, up to 10 times that of salmon, if bluefins were to be farmed at the same scale as 21st-century salmon farming, many of their prey species might become depleted
Is it that they spice the patties or something else? What’s the liklihood their burgers are mixed meat? Like maybe goat + beef?