Frozen hairy crabs can be eaten. Most of the nutrients can be retained after fresh hairy crabs are frozen. When fresh hairy crabs are frozen, the low temperature can inhibit the activities of fungi and parasites in the crab. However, hairy crabs are already dead after freezing and will deteriorate quickly after rapid thawing. It should be cooked and consumed as soon as possible to prevent the fungi and parasites in them from increasing their activity and multiplying in large numbers after warming up, reducing the nutritional value of hairy crabs and easily causing gastrointestinal discomforts such as diarrhea.

If the crab is already dead before freezing, or you are not sure if it is alive after freezing, it is recommended not to consume it. Due to the high protein and water content of hairy crabs, it is easy to breed bacteria quickly, and the protein can be easily decomposed and metabolized into cadaverine and histamine, which are allergic and toxic.

Hairy crabs are rich in protein and vitamin A, as well as a large amount of calcium, iron, zinc and other trace elements. Moderate consumption can enhance immunity and promote metabolism. It is also rich in DHA, which can promote brain development and improve intelligence. It is an important substance for the intellectual development and visual development of infants. However, some of the nutrients will be lost with thawing after freezing. It is recommended to eat fresh hairy crabs.