Crab farming is something that needs a lot of knowledge and patience. While selecting crabs, the ones which are in demand in the domestic and international markets, should be selected. Such good varieties of crabs are developed by Central Marine Fisheries Research Institute (CMFRI), India. It would be ideal to buy crab from such research centres for farming.
The first step is to prepare the pond for the crab. All the water present in the pond should be drained and the fishes and waste material should be removed. Once the pond is fully dry, water should be pumped in and that too after filtration. Water should be at a level of 1 meter, and into that, add lime at the rate of 50 kg lime for a hectare of farmland. If the PH of water is low, add more lime. Now the crab can be dropped into the pond at the rate of 10000 crabs per hectare. The crab should be familiarized with saline water before dropping in the pond. A platform should be made in order to feed the crabs. Fishes, shell fish, oilcakes, rice husk etc. are favourite foods. The food should be provided according to the use only. The pond where crab are cultivated should be protected with nets and sheets so that they don’t escape. Also put pipe pieces, tiles or bricks in the water. Crabs have the habit of eating among themselves, and the pipes etc are put for them to escape. Crabs have to be picked from the pond using nylon net attached to a cane. Fully grown crab can be sold in the market. The pond can be drained off water and all the crabs can be caught and the smaller ones can be reused for the next round. With good patience, crab farming can be successfully done.