1. Geography: If you do it along the coast, regardless of experience, because there is no limit on the quantity of transportation, preservation and purchase, the consumer market is mature, and survival is not a problem, so the profit is also considerable.

2. Source of supply: If you live by the sea or are fishermen, you can get the freshest seafood as quickly as possible, which reduces the cost, or you can let some fishermen become regular suppliers and try to omit intermediate links, so the net profit will increase a lot. Although doing seafood business makes money, it suffers serious losses. Generally, even if a ship of seafood is raised ashore, there will be a mortality rate of about 20%.