How do small crabs feed and what do small crabs eat?

It is best to keep small crabs in the fish tank at home. The water level can reach half of the crab's body, or it can just overflow the crab's shell, that is, it is necessary to add stones to the tank to let the crab climb up and escape. Small crabs also need proper sunshine, which can promote their growth and help them shell, that is, when the weather is hot, avoid direct sunlight and stay in the sun for not too long. Small crabs like to eat meat. They can be fed with snail meat, fish meat and shrimp meat, which can make them grow healthier. Change the water frequently, keep it clean and avoid getting sick. Feeding small crabs is very simple. It is an omnivore, so it is everything. It prefers to eat shrimp and fish, and it can also eat some egg yolks and animal offal. Pig liver, fish fry, chicken offal, shrimp, egg yolk, and some eat mud. My family also keeps a few small crabs, and the diameter of each shell is about 3~4 cm. I found in the data that crabs are omnivores, so there will be such a situation. However, it is said that crabs need calcium for their growth, so it is best to feed some small fish and shrimp. But I didn't buy a small fish and shrimp suitable for it. Sometimes small earthworms are used instead. But it's more troublesome and inhuman to small earthworms. Therefore, it is recommended to feed shrimp skin, which also loves to eat. Try to get close to it when feeding, because in my experience, their eyesight is not very good. Don't disturb it to eat. My little crabs often kill each other because the place is too small. Now every crab has lost an arm and a broken leg. We should all be kind to animals. It is an omnivore, but if the food is delicate, it may die. In the natural environment, snails, mussels and some small fish and shrimp are the main food. If it is not expensive, it is smart. Will it eat some weeds, duckweed and other plants to help digestion? If it keeps itself, I suggest feeding it to small fish and shrimp. It likes to eat these things. At least, it won't eat them and put some weeds. It is best to feed small crabs with eat small fish shrimp. Small fish and shrimp are rich in nutrition, and small crabs like to eat them.