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.

The Other Line on Shrimp You Don’t Need to Worry About

Shrimp also have a channel on the underside of their bodies, which is actually a blood vessel. This part does not contain waste and poses no issue, so it does not need to be removed. Only the dark line along the back is relevant.