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| SN | Fish byproducts | Nutrient content | Uses | References |
|
| 1. | Fish meal | (i) High levels of lysine, methionine and cysteine
(ii) Rich in minerals like ca, P, Cu and Fe
(iii) Good source of vitamin B12, chlorine, niacin, pantothenic acidv and riboflavin | (i) Livestock feed
(ii) Fish and shrimp feed | [65] |
| 2. | Fish liver oil | Vitamins A and D | Therapeutic purposes in treatment of vitamin A and D deficiencies | [65] |
| 3. | Fish body oil | Polyunsaturated fatty acids (PUFA), particularly η3 PUFA | (i) Control of heart ailments in humans
(ii) Suitable as oil for diesel engine | [65]
[66] |
| 4. | Fish silage | | Cattle feed | [65] |
| 5. | Fish protein concentrate (FPC) | Fat content up to 3% | Protein supplement in human diet | [65] |
| 6. | Chitin | | (i) Growth promoter in animals and birds
(ii) Feed ingredient
(iii) Use of chitosan as natural flavouring material | [65] |
| 7. | Prawn head meal and shell waste | Protein, Minerals and Chitin | Natural flavouring material | [65] |
| 8. | Fish skin | | To obtain collagen and gelatine | [67] |
| 9. | Fish bone | Ca | (i) Important for bone health and, in combination with vitamin D
(ii) Improves cardiac health along with a number of diseases including gastrointestinal diseases, diabetes, and hypertension | [67] |
| 10. | Enzymes from fish viscera | Pepsin, trypsin, chymotrypsin, and Elastase | (i) Production of bioactive components in a large scale
(ii) Production of fish protein hydrolysate and fish roe, fish sauce
(iii) Enzymatic removal of fish skin
(iv) As pearl essence | [67] |
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