Grouper gills black can't be eaten. The gills are not edible, because the gills are used by the fish to breathe, and there are bacteria and harmful substances on the gills, so the grouper gills black can not be eaten. In the process of fish breathing will be some bacteria in the water, parasites and other harmful substances, stick in the gills.

So there are a lot of bacteria and harmful substances on the gills of the fish, and the parasites contained in the gills of the fish are not processed well at high temperatures, and in the process of human consumption, the parasites will enter the human body, affecting the health of the human body.

Nutritional value

Grouper grouper with the highest protein content of green grouper, higher than the protein content of rhubarb fish, followed by brown grouper, pearl gentian grouper and grouper point with grouper, grouper with seven bands and grouper with red point of the protein content of the Chinese seabass, turbot, and saddle banded groupers and black grouper and sea bream The protein content is close and relatively low, about 66% dry weight by weight, but the fat content is more than 10 times higher than turbot.