What “deveining shrimp” actually means
When people talk about deveining shrimp, they are referring to removing the dark line that runs along the back of the shrimp.
Despite the name, this “vein” is not actually a blood vessel. It is the shrimp’s digestive tract. In biological terms, it
may contain:
Digested food
Sand or grit (depending on where the shrimp was harvested)