Would you cook this piece of COD with a potential worm?

So I picked up this piece of cod on sale and without checking there is what I think to be a fish worm?

This is my first time ever actually cooking fish, so I have no idea if this is a normal thing that is completely harmless when I cook it fully through, but at the same time it’s kind of worrying to see what I think as being a worm

What do you guys think?