How much percentage of protein does a fish contain?

Option A

The value of fish proteins is  less than 30%. It is better than meat protein and, although inferior to milk and egg protein, has a stable composition of essential amino acids, with slight deficiencies of methionine and threonine, and an excess of lysine – very important if we take into account the fact that this latter amino acid is lacking in cereals.

The protein content of a species depends on many biological and environmental circumstances (sex, age, sexual maturity, nutritive conditions, etc.); this variation can be rhythmic, periodic, or nonperiodic. Finfish can show a wide range of variation between ∼10 and ∼30% in wet weight.