Aquatic and Land Animal Diversity

Aquatic and Land Arthropods

What are the only crustaceans that don’t move around?

Barnacles are the only sessile (permanently attached to one location) crustaceans. They were described by the nineteenth-century naturalist Louis Agassiz (1807–1873) as “nothing more than a little shrimplike animal standing on its head in a limestone house and licking food into its mouth.” Accumulations of barnacles may become so great that the speed of a ship may be reduced by up to 40 percent, necessitating dry-docking the ship to remove the barnacles.


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