Crab larva is the early stage of a crab's life cycle. The first stage is the GRUB, which is a small, soft-bodied larva with no legs or eyes. The next stage is the PUPA, which is a hard-shelled larva with legs and eyes. After that, the larva becomes a TADPOLE, which is a swimming larva with gills and a tail. Finally, the larva develops into a NYMPH, which is a wingless adult with legs and eyes. The last stage of the crab larva is the MAGGOT, which is a legless larva without eyes.