Explanation:

The percentage composition of the four major constituents of fish viz. water, protein, lipid and ash (minerals) is referred to as proximate composition (it may be noted that the term does not indicate any degree of inaccuracy in the analysis). These four components account for about 96-98% of total tissue constituents in most cases. The main constituent of fish flesh is water, which usually accounts for about 80 per cent of the weight of a fresh fish.