Water, Animal morphology, Integumentary system, Zoology, Animal anatomy, Epidermal cells, Cytology, Animal organs, Cell biology, Molting, Biology, Aquatic arthropods, Crustaceans, Aquatic invertebrates, Physiology, Chemical properties, System physiology, Ecdysis, Animal physiology, Integument, Animal cuticle, Cardiovascular physiology, Hemolymph, Earth scien...