Identification method of fish seed quality

The vast number of households have accumulated a wealth of experience in practice, in which the identification method of fish quality is simple and practical, and it is worth learning from local farmers. One is to observe and identify its body directly with the naked eye. Excellent fish species: the fry of the same age fish have the same specifications, small head and thick back, bright body color, moist skin and no parasites. Swimming is lively, clustered, strong against water, and quick to react when frightened, while inferior fry have irregular specifications, large head and narrow back, thin tail stalk, dim body color, body surface injuries or parasites. Slow swimming, dispersion, weak reverse water, often on the surface of the water, not agile when learning to be frightened. The second is to distinguish from the degree of resistance of fish species to the current. Use a plastic basin filled with water 1/3, put in an appropriate amount of fish species, stir the fish and water by hand, so that the water in the basin into a circulation swirl, sink at the bottom, can go against the current is the high-quality fish species, otherwise it is inferior fish species.