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The quality of crab
(1) High quality crab seedlings with a yellowish-yellow color or a brownish-yellow color; if the shell is transparent, white or dark black, it is a reflection of "too tender" and unhealthy; (2) the body surface is smooth and unstained This is a sign of healthy seedlings; if the body surface and appendages are fixed or have foreign matter, it is unhealthy; (3) healthy seedlings swim in the water and they move quickly; if the crabs are In the water, the bottom of the water or the bottom of the water is the inferior seedlings. (4) The healthy crabs crawl quickly after leaving the water; if they are gathered together, they are the performances of poor vitality; (5) There are a large number of dead seedlings in the pool and they are still alive. The disease is also caused by seedlings; (6) After desalination and cooling for more than 6 days, the specifications are between 140,000 and 170,000/kg, and the uniform size is 80%-90% for high quality seedlings. If the individuals are too small, the quality Poor, in order to minimize the tenderness of young seedlings. For example, 1.8-22 million kilograms per kilogram are medium quality seedlings, and 24,000-300,000 kilograms per kilogram are inferior crab seedlings. (7) Grab a handful of crabs, have a gripping feel, lightly grip and let go, and can quickly flee around, then it is a good quality seedling, otherwise it is not; (8) There are baits in the stomach of the crabs, but not many; crab seedlings When weighing, there should be no residual bait impurities and dead seedlings. The seedlings are over-weighed after being drained in the cage (the amount of moisture contained is appropriate, and no dripping is used during weighing).