Solved 6. The crayfish usually molts, or sheds its | Chegg.com Although the crayfish has an inflexible cephalothorax, the crayfish is classified as a segmented animal. Why? Question: 6. The crayfish usually molts, or sheds its exoskeleton, twice a year. Why does the crayfish "hide" after it molts? Although the crayfish has an inflexible cephalothorax, the crayfish is classified as a segmented animal. Why?