1. The eggs can be preserved for a long time under dry condition. When they are put into water with salinity of 20-30 and temperature of 25-27 degrees Celsius, and satisfy the dissolved oxygen of hatching eggs, the larvae are hatched after 24-48 hours.
2. When hatching the eggs of adult worms, the impurities and sediments on the eggs can be washed off with glycerin saline to obtain the floating clean eggs; the eggs can also be frozen first, gradually from - 3 C to - 15 C, refrigerated for 1-3 months and then hatched, and the hatching rate can be 60-90%.
3. Put the winter eggs (or after disinfection and shelling) into the sea water directly. The water temperature is kept at 28-29 C. After 24-30 hours of direct ovulation, they can develop into nauplii.
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