According to official website, frozen sea cucumbers can be stored for 1~3 months. Sea cucumber is the general name of echinoderms sea cucumber. Although sea cucumber is cylindrical, its thickness, shape and size vary greatly among different varieties. Common large edible sea cucumbers are thick cylindrical, with warty feet on the back and tube feet on the ventral surface. The body wall of sea cucumber is flexible and rich in connective tissue, and its thickness varies with species.