A mature female blue crab (Callinectes sapidus), known colloquially as a "sook."
Note the apron, shaped like the Capitol building, and the red-tipped claws.
Image ID: line0841, NOAA's America's Coastlines Collection
Location: Maryland, Chesapeake Bay
Photo Date: 1999 April 22
Photographer: Mary Hollinger, NODC biologist, NOAA
Category: Coastline/Chesapeake Bay Maryland/
• High Resolution Photo Available