Separate stocks of Northern prawn (P. borealis) have not been clearly defined and may represent a single metapopulation within the Northwest Atlantic. However, there are some differences that provide basis for delineating assessment and management units into Shrimp Fishery Areas (SFAs). This profile corresponds to the SFAs 13-15. Ten other assessment units are considered within Candian waters, along with three other assessment units in the NW Atlantic: Northern prawn – Western Greenland, Northern prawn – Flemish Cap and Northern prawn – Gulf of Maine.