1, crayfish China is a big country that produces and eats crayfish. Usually a crayfish is served in a restaurant or barbecue stall, which is delicious with drinks. After years of exploration and research, the culture technology of crayfish is very mature. Because of its high price and huge profit space, crayfish is one of the most profitable varieties in aquaculture.

2. crabs. Like crayfish, crabs are frequent visitors to our table. It tastes delicious and is loved by many people. Crab is a common freshwater aquaculture. Crabs in China formed an industrial scale in the early 1990s and have a long history of breeding. Compared with the mature breeding foundation and technology, the breeding risk is low. There are many kinds of crabs, and the prices on the market are different, but the high profit of breeding is certain.

3. abalone Abalone is delicious and has the reputation of "soft gold in the sea". It is a precious sea treasure. Abalone culture methods mainly include raft culture at sea, factory culture on land and sinking box culture in rock tide. It is an aquaculture project with high output and high profit. Similarly, its initial investment is huge and its breeding risk is high. However, if the breeding technology passes the standard and the disease control measures are good, its breeding prospect is still very good.

4. oysters. Oyster is the largest kind of oyster. It feeds on natural floating bait and is a rare natural green food, which is becoming more and more popular and the market demand is increasing.

5. tortoise. Compared with others, turtle culture has a short history and its technology is still maturing, but its market has been rising steadily. Still high consumption, ordinary families only eat once in a while. Its breeding cycle is long, and it takes a turtle 15- 18 months from birth to sale. The initial investment is large, which is not suitable for small-scale farming.