On June 8, 2022, the National Office of Intellectual Property issued Decision No. 2576/QD-SHTT on the granting of Geographical Indication Registration Certificate No. 00116 for "Ca Mau" crab products. Department of Science and Technology of Ca Mau province is the organization managing this GI.

Crab bearing Ca Mau GI is a blue crab variety (scientific name is Scylla paramamosain) exploited naturally or artificially reproduced at hatcheries in Ca Mau province, stocked at a density of 1-2. crayfish combined with other aquatic species such as shrimp, blood cockle... to supplement natural food for crabs.

In addition, crabs are also supplemented with trash fish and molluscs exploited locally, supplemented with minerals, vitamins, and digestive enzymes. Feed crabs twice a day, the amount of food is 5 - 7% of body weight/day. After more than 4 months of rearing, the crabs are harvested to reach commercial size so that the crabs have a uniform size and quality.

Geographical area: Including communes, wards and towns in Ca Mau province, specifically:

- Rach Goc town and the communes of Dat Mui, Tam Giang Tay, Tan An Tay, Tan An, Vien An Dong, Vien An in Ngoc Hien district;

- Nam Can town and Dat Moi, Ham Rong, Hang Vinh, Hiep Tung, Lam Hai, Tam Giang and Tam Giang Dong communes of Nam Can district;

- Cai Doi Vam town and the communes of Nguyen Viet Khai, Phu My, Phu Tan, Phu Thuan, Rach Cheo, Tan Hai, Tan Hung Tay, Viet Thang in Phu Tan district;

- Dam Doi town and the communes of Ngoc Chanh, Nguyen Huan, Quach Pham, Quach Pham Bac, Ta An Khuong, Ta An Khuong Dong, Ta An Khuong Nam, Tan Dan, Tan Duc, Tan Duyet, Tan Thuan, Tan Tien, Tan Trung, Thanh Tung, Tran Phan belong to Dam Doi district;

Ca Mau is one of 13 provinces in the Mekong Delta, with 3 sides facing the sea, so it is very convenient for the development of aquaculture, in which, sea crab is one of the products with high economic value. Most people in Ca Mau are intercropped with shrimps and fishes.

Ca Mau crab has a large size, brick crab has a body length of 11.3 - 13.14 cm, a body width of 7.92 - 9.66 cm, a body thickness of 3.37 - 4.95 cm, weight from 0.26 - 0.39 kg/crab; Meat crab has a body length of 9.84 - 13.66 cm, body width of 6.68 - 9.96 cm, body thickness of 3.2 - 4.7 cm, weight from 0.22 - 0.46 kg/ child.

Ca Mau crab is a food that is nutritionally appreciated due to its high protein and lipid (fat) content in crab meat and bricks. Ca Mau brick crab has a protein content of 14.06 - 19.99% in crab meat, a lipid (fat) content in crab meat of 0.46 - 2.1% and a lipid (fat) content in crab meat 5.64 – 10.62%. Ca Mau crab meat has a protein content of 14.34 - 18.75% in crab meat, and a lipid (fat) content in crab meat of 0.44 - 1.92%.

In addition to the natural conditions, the crab production skills of the people in the geographical area also play an important role, determining the quality of Ca Mau crab. The pond must have a firm, leak-proof embankment, the height of the embankment must be 0.5-0.8m higher than the highest water level in the year, with water supply and drainage lines. The water environment is always guaranteed to have salinity: 15 – 25‰; pH: 7.5 – 8.5; water temperature: 28 – 32oC; alkalinity: 80 – 160 mg/l; Dissolved oxygen: > 4 mg/l; transparency: 30-40 cm. The water is light brown or pea green. In addition, people also dredge the bottom mud after 2-3 farming seasons to improve and release soil fertility.