Crangon is a genus of shrimp. Crangon species are found exclusively in the Northern Hemisphere, with most of the species occurring in the northern Pacific Ocean. C. septemspinosa is the only species in the genus to occur in the north-western Atlantic Ocean, while in the north-eastern Atlantic, C. crangon and C. allmanni occur. With the exception o... Found on http://en.wikipedia.org/wiki/Crangon