I just finished a mandatory food sanitation course so I should be able to tell you all about this. Should.
But I can tell you that a visible worm in a fish can just be picked out, and if not it's just extra protein and nothing more.
Did you fail that course?
Not to be a dike... but I would LOVE to see your test scores, goose. A tapeworm isn't a 'worm'. Its a parasite that can infect you and really hurt you if not taken care of. It is no source of protein whatsoever. Where you got that misconception after finishing a 'food sanitation course', I can't begin to imagine.
No. Romascu may need medical attention if he does indeed get a tapeworm. It leaches your body for nutrients and grows, which is why you get so [censored] hungry and eat like a horse all the time. Which also causes you to lose weight, and (for obvious reasons) become malnourished.
Romascu, if you want to continue eating this kind of marinated fish, at least blanch it in hot water. That won't cook it and it will likely kill most parasites.