Farms specializing solely in crabs have only been established in recent years, as it was realized that fertilized female crabs can fetch a much higher price.
後來慢慢有專業養蟹場，由於紅蟳價格極好，有人更專門收購已交配、但蟹黃尚未成熟的空母，細心地蓄養，並給予營養豐富的餌料，待卵巢充實飽滿時以好價錢出售。