The Bald Eagle is the bird symbol of the U.S.A.
... but did you know each of the U.S. 50 states also has a symbol ? (1)
The Blue crab is the crustacean symbol of Maryland -more specifically, of Chesapeake Bay.
As it is both a predator and a prey, it is a keystone species.
Click its photo above ⇑:
you'll get further information on the crustacean on the Chesapeakebay website.
(1) : actually, there are several symbols for each state !