The Atlantic mackerel ranges in size from 250 to 800 grams with the majority in the 300 - to 600 - gram range. (fooddrink-magazine.com)
As you can see, these are all high - carb foods, so they are out of the question if you are currently on a very low - carb diet (although you can fit some in if you're on a low - carb diet with carbs in the 50 - 150 gram range - which is also low - carb). (healthline.com)
L. larvaepartus is in the 5 - 6 gram range, McGuire said. (sciencedaily.com)