|Ghost and mud shrimps live in deep, sometimes complex, burrows in intertidal and shallow subtidal waters. Some burrows can exceed depths of 2 m. Their burrowing and water circulation exert a large ecological influence on the sediment structure and geochemistry of environments where they are abundant by dispersing nutrients and oxygen throughout the sediment, which not only benefits them but neighboring organisms as well. Their bodies are long and narrow, more lobster-like than shrimp-like. Their carapace is usually very soft and pliable. They are sometimes used as bait by fishermen who pump the shrimp out of their burrows with a special device.