Three sources of seedlings are available: collecting wild seedlings, semi-artificial seedlings and artificial seedlings in the sea area. In the current production, seedlings are obtained by means of half artificial seedlings in the sea area. (1) The picking field must be selected in a sea area where there are a lot of pro-baits. The shape of the sea area is preferably a semi-circular bay. Overseas islands shield wind and waves, the tide in the bay is smooth, and the physical and chemical properties of seawater are stable. There is no large amount of freshwater injection and no pollution nearby. The salinity is not less than 18 ‰ and the water temperature does not exceed 29 CC. (2) The attached seedling equipment shall have durable, large surface area, non-toxicity, easy collection, and convenient source. At present, ropes, old tires, sticks, stones, shells, etc. are used to process the strings for the use of seedlings. (3) Seedlings harvesting at the seedling stage should be put in before the breeding season, and should not be released too early or too late. (4) The seedling method for hanging seedlings generally hangs within 3 meters of the water layer. The load of the floating raft cannot be too large, and 800-1000 ropes are hung in one mu. Methods include: hanging on one side, hanging on the side and hanging on the side. (5) The post-seedling management often inspects the amount of seedling attached, and eliminates floating rafts and algae and harmful animals in time. With the growth of seashell seedlings, buoyancy and anti-sinking should be increased in time (6) Receiving seedlings for 2 months or so, the body length can reach 1 cm, and the time for collecting seedlings is generally in the middle or late August. Some places receive seedlings ahead of schedule before the typhoon season arrives.
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