What Is The Dark Vein On The Underside Of Shrimp?
The dark vein on the underside of shrimp is actually its digestive tract, also known as the “sand vein.” It should be removed before cooking as it can sometimes contain sand and impurities. To remove it, use a sharp knife or kitchen scissors to make a shallow cut lengthwise along the back of the shrimp and gently pull out the dark vein with the tip of the knife or your fingers.