Crabs are omnivores. Generally the artificial cultivated ones are based on carrion food, and some breeders also feed some dried fish and insects or water plants. Wild crabs are equivalent to free-range, in the natural environment of the weak and strong, they feed on the carcasses of fish and shrimp, water plants, snail meat, etc., and in the case of food scarcity, they will also feed on their own kind. If you are keeping them temporarily at home by yourself, you can feed a little sesame seeds and crushed eggs to the crabs so that they can grow fat in just a few days. Crabs are not picky eaters, so if you want to keep one or two at home it is possible. Small shrimps, eggs, cabbage and dried beans are all things that crabs eat. But it is recommended that all these things fed to the crabs should preferably be cooked, because raw ones will make the water in which the crabs are kept smell fishy very quickly.

1. Saltwater crabs eat fish and freshwater crabs eat rainbow worms and fish. You can use pots to keep it,but the water should not be too deep, it is best if the eyes can show the water surface if you stick them out. But it's best if the water is just soaked through the shell. You can use tap water, but it needs to be in the sun for a day before you use it. If you have the conditions, make a small platform. You can let it bask in the sun, not too long on it.

2, you can also feed them fish, sea crabs can be fed chicken and duck offal or small fish and shrimp, whether raw or dried fish, they can accept. May also feed them fish feed, red worms, shrimp, snails, mussels.

3, it is best to often feed some grass food, there are bitter grass, ilex algae and so on. As long as the feeding is OK,you don't need to worry about the rest. Crabs are very good to keep.

4, the crab is an omnivore, generally eat some phytoplankton, aquatic plants, terrestrial animals, benthic animals. Phytoplankton including algae, green algae and other algal plants, aquatic plants including bitter grass, duckweed and other terrestrial plants and animals such as yellow mealworms, earthworms, etc., benthic animals including snails, mussels, etc..

5, artificial bait generally have soybean, bean cake, vegetable cake, etc., raising crabs must be in full sunlight, good water quality, must be arranged to let it hide, can use tile building can also use small stones. After feeding food to the crabs must be timely clean up the residue, to avoid high temperature situation food residue in the water deterioration.

Feeding crabs in the process must keep the water clean, if you feed crabs in deeper water must maintain sufficient nutrient air, crabs as long as the gills remain moist is in the air to absorb nutrients, so do not have to be very deep water can be cultured. The lifespan of crabs varies by species. Some crabs, such as the Japanese Crab Spider, are said to live for over 100 years, while others, such as the Blue Crab, only live for 2-3 years. Most species of crabs go through several developmental stages throughout their lives, somewhat similar to the developmental stages of insects. The exact number of immature stages depends on the species, and each stage is separated by molting. Once the megalopa stage is reached, immature crabs take on a form similar to that of an adult crab. The transition from the megalopa stage to the juvenile stage is the most critical stage in crab development and must take place in a highly specific environment.