Fishes are very important to man economically.
1. As food,
2. They give by-products.
3. To control diseases.
Fishes as Food: - Fish is good food to man. The flesh of flesh is rich in proteins and fat. Dry fish also contains A and D vitamins. It contains minerals. Much of the flesh can be digested by man. Food fishes are both marine and fresh water.
Ex: - Labeo, Catla, Trygon, etc
Fish oil: - From the liver of the many fishes oil is extracted.
The Extracted oil from Bombay duck is used in Paints.
Fertilizers: - The ‘fish waste’ materials have more calcium, protein, phosphorous and other substances. These materials are grined into powder. It is used as fertilizer to Grape gardens, Coffee and Tea plants.