Write about some of the fish by products in brief

Explanation

(i) Fish oil is the most important fish by product. It is derived from fish liver and from the fish body. Fish liver oil is derived from the liver which is rich in vitamin A and D, whereas fish body oil has high content of iodine not suitable for human consumption, but is used in the manufacture of laundary soaps, paints and cosmetics.
(ii) Fish meal is prepared from fish waste after extracting oil from the fish. The dried wastes are used to prepare food for pig, poultry and cattle. The wastes obtained during the preparation of fish meal are widely used as manure.
(iii) Isinglass is a high -grade collagen produced from dried air bladder or swim bladded of certain fishes viz. catfish and carps. The processed bladded which is dissolved in hot water forms a gelatin having adhesive property. It is primarily used for clarification of wine, beer and vinegar.