the other black line in shrimp, what is it?

In cleaning and deveining shrimp I have noticed two distinct black tracts (vessels). One of the lines is closer to the outer curvature of the body, which I believe is the digestive tract, and one is closer to the inside curvature of the body, which I have yet been able to identify. What is it? Just to be on the safe side, I routinely remove both of them.

Thanks :slight_smile:

Along the belly of the beastie? Spinal cord most likely.

And no need to remove it. Thereโ€™s nothing nasty there.