It is endemic to DC. When I first saw the article below I thought wow, a local shrimp or shrimp like critter. But then I discovered this. This amphipod measures 10 millimeters (0.39 in) in length. Because it lives underground, it is white in color and eyeless.
http://baltimore.cbslocal.com/2013/12/0 ... rple-line/
Stygobromus hayi
Stygobromus hayi
Joe