The best way to raise small crabs at home is to use a fish tank, the water level can reach one-half of the body of the small crabs, or just over the shell of the small crabs can also be, is the need to add stones in the tank, for small crabs to climb and hide. Small crabs also need to appropriate sunshine, can promote its growth, but also can help small crabs shell, is in the hot weather, to avoid direct sunlight, at the same time the sunshine time can not be too long. Small crabs like to eat meat, you can feed it snail meat, fish and shrimp meat, can make it grow healthier, it is the need to change the water often, maintain the cleanliness of the water, in order to avoid the small crabs sick small crabs are still very simple to raise small crabs, it is a kind of omnivorous animal, so everything is, more like to eat shrimp and fish, but also can eat some egg yolks and animal offal. Pork liver, small fry, chicken offal, shrimp, egg yolk, and some eat mud. I also have a few small crabs at home, the diameter of each shell shell is about 3~4 cm. I checked in the information that crabs are omnivores, so it will appear to say. However, the information said that crabs need calcium to grow, so it is better to feed some small fishes and shrimps. But I didn't get small fishes and shrimps suitable for it. Sometimes just use small earthworms instead. But this is more troublesome and inhumane to the small earthworms. So it is recommended to feed shrimp skin, which it also loves to eat. Try to be close to it when you feed it, because in my experience their vision is not very good. Don't disturb its feeding. My little crabs used to kill each other because the place was too small. Now every crab is missing arms and legs. We all need to be kind to animals. It belongs to the omnivore, but the food is also to pay attention to, can not be eaten indiscriminately, may die, in the natural environment, it is mostly screws, mussels and some small fish and shrimp and so on for food, not expensive it is very smart will not eat some weeds, pumice and other plants to help digestion, if you raise, I suggest feeding small fish and shrimp, these things it loves to eat, at least, it will not eat, and then set some weeds inside, so that the sun is both shade and shade. The sun is both shade and can be washed as food, very good. Feeding small crabs is best to give it small fish and shrimp, nutritious, small crabs also like to eat.