Shrimp is one of the most valued ingredients in cuisines around the world. Its delicate flavor and tender texture make it ideal for both everyday meals and elegant dishes. However, one small detail often raises questions among home cooks and professionals alike—the dark line running along the shrimp’s back, commonly called the “vein.”

What Is the “Vein” in Shrimp?

Despite its name, the shrimp’s “vein” is not a vein at all. It is actually the shrimp’s digestive tract, or intestine. This runs along the upper part of the body and may contain remnants of what the shrimp consumed before being caught, such as algae, plankton, or tiny particles from its environment.

Because of this, the line often appears dark brown or black, depending on its contents.

Is It Dangerous to Eat Shrimp Without Removing the Vein?

From a food safety perspective, eating shrimp with the digestive tract intact is generally safe—as long as the shrimp is fresh and properly cooked. High cooking temperatures eliminate harmful bacteria and significantly reduce health risks.