Removing it usually results in a cleaner, smoother flavor and a more pleasant bite.
How to Devein Shrimp Easily
Deveining shrimp is a simple process that requires no special tools:
With raw shrimp, make a shallow cut along the back and gently lift out the vein using the tip of a knife or a toothpick.
It can also be done after cooking and peeling, though the shrimp will be firmer and slightly harder to work with.
Do All Shrimp Need to Be Deveined?
Not necessarily.
Small shrimp: The vein is often barely visible and commonly left intact.
Large shrimp: The vein is more noticeable and is usually removed for both visual appeal and better flavor.
This is why many markets sell shrimp that are already peeled and deveined for convenience.