Tags: Crustacean.
Panopeus herbstii (the black-fingered mud crab black-clawed mud crab Atlantic mud crab or sometimes common mud crab) is a true crab belonging to the infraorder Brachyura and is the largest of the mud crabs.P. herbstii is small growing to about 4 cm with black-tipped claws of unequal size. P. herbstii has a strong exoskeleton with very thick and strong claws. The shell is a dull gray and brown color.P.