Where are the walking legs of crustaceans found?

The crustaceans can be found almost anywhere there is water - salt or fresh. They live in the water in many cases, but lots of varities live on land near water or moisture. There are over 50,000 different "flavors" of these critically important animals. Crustaceans are the shrimp, crab and lobsters, and there are some in places where no other creatures can stand the water because it is too hot, too salty or in some other way less than habitable. Crustaceans are found in deep caves where there is no natural light (and they are blind), in deep oceans where the only source of energy is thermal vents on the ocean floor, and most rivers and streams of any size. A link is provided to the Wikipedia article on these amazing critters, which are a subdivision of the arthropods.