Where do most crustaceans live?
Crustacans are known from just about every major habitat on the earth, from montane cloud forests to deep-sea hydrothermal vents, and from tropical coral reefs to the frigid waters of Antarctica. Many live in freshwater, such as the familiar crayfish and a huge number of freshwater crabs, and some live only in ephemeral (temporary) pools that are dry for much of the year (fairy shrimp, tadpole shrimp, clam shrimp and their relatives). However, by far the majority of crustaceans are “marine,” living in or very close to the sea.
